ミステリー・スリラーの表紙

偽りの窓

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "THE FALSE WINDOW". Exact author text: "ADRIAN COLE". Subject: a lit apartment window reflected in a black river where no building stands. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

DEAD AIR

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "DEAD AIR". Exact author text: "LENA PRICE". Subject: a radio studio microphone glowing alone while a waveform monitor goes flat. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

ザ・ナイト・アーカイブ

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "THE NIGHT ARCHIVE". Exact author text: "SIMON REED". Subject: rows of dark archive shelves with one drawer pulled open in cold fluorescent light. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

彼女が消える前に

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "BEFORE SHE VANISHED". Exact author text: "KATE MERCER". Subject: a blurred figure crossing a wet intersection seen through a car windshield. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

THE THIRD KEY

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "THE THIRD KEY". Exact author text: "NORA VOSS". Subject: three antique keys on a police evidence envelope under a single desk lamp. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

NO WITNESSES

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "NO WITNESSES". Exact author text: "ELI CROSS". Subject: an empty subway platform with a dropped red glove near the yellow safety line. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

ROOM 417

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "ROOM 417". Exact author text: "MARA KLINE". Subject: an old hotel corridor ending at one half-open door with light spilling beneath it. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

THE LONG WAY DOWN

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "THE LONG WAY DOWN". Exact author text: "P. HOLLOWAY". Subject: a lone car with headlights on beside a fogbound coastal cliff road. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

LAST CALL

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "LAST CALL". Exact author text: "S. BEAUMONT". Subject: a telephone hanging off the hook on a nightstand cut by red neon through blinds. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

静かな家

Create one finished mystery thriller front book cover in a single generation, 1024:1536 portrait composition, flat cover artwork only, never a book mockup. Exact title text: "THE QUIET HOUSE". Exact author text: "D. MARCH". Subject: a woman silhouetted in a rain-lit doorway beneath a distant streetlamp. Composition: preserve a clean title zone, one dominant focal idea, readable silhouette at thumbnail size, and professional trade-publishing hierarchy. Style: tense film-noir realism, hard directional light, fog or rain, uncluttered focal mystery. Color and light: charcoal, slate blue, and one controlled red or sodium-amber accent. Typography: stark condensed sans-serif capitals with tight tracking; render the exact title and author once only, with correct spelling, clean kerning, no extra words, no duplicate letters, and no invented publisher marks. Constraints: print-ready front cover, polished visual hierarchy, coherent anatomy and perspective. Avoid: malformed text, repeated author names, extra logos, watermarks, borders, 3D books, hands holding a book, or horizontal mockups.

침묵의 정원 — 韓国ミステリー／スリラー表紙

A manicured garden at midnight where every hedge shadow points toward one gate. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Korean only; render the quoted title and author name in correct, complete Korean Hangul. Book cover with title "침묵의 정원" and author name "강도윤" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

第十三个房客 — Chinese Mystery / Thriller Cover

A hotel corridor at night where every door is identical except one, slightly open. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Chinese only; render the quoted title and author name in correct, complete simplified Chinese characters. Book cover with title "第十三个房客" and author name "陆知非" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

The Witness Wall

A wall of nine identical apartment windows at night, one lit, one motionless figure. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be English only. Book cover with title "The Witness Wall" and author name "Ruth Kellerman" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

Last Train North

A single lit carriage of a night train crossing a viaduct in deep fog. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be English only. Book cover with title "Last Train North" and author name "Eli Solberg" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

溺れる時間

A single hand reaching from still black water beneath a broken jetty. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be English only. Book cover with title "The Drowning Hour" and author name "Nell Hardaker" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

Red Door Number Nine

A lone silhouette before the only red doorway on a snowy residential street. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be English only. Book cover with title "Red Door Number Nine" and author name "Marcus Vane" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

静かな家

A candlelit library aisle where one lamp burns beside an empty reading chair. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be English only. Book cover with title "The Quiet House" and author name "Ava Marsh" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork, a high-contrast palette, an author name placed deliberately and secondary to the title, short correctly rendered title text in the requested language enclosed in quotation marks, and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir or dark-academia tension and a contemporary publishing finish; the author name reads as a brand element. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber; grounded photorealism where it deepens the dread. Typography: render the exact quoted title once in stark condensed sans-serif capitals at commanding scale and the exact quoted author once in clean spaced type placed with brand confidence; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or cropped title, misspelled author, duplicated text, landscape layout, gore, generic police collage, mockup, spine, watermark

返信のない部屋 — Japanese Thriller Cover

A dark apartment where a phone screen glows beside an unanswered letter. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Japanese only; render the quoted title and author name in correct, complete Japanese characters. Book cover with title "返信のない部屋" and author name "桐生かえで" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build a compelling genre-appropriate key image, readable title hierarchy, deliberately placed author name, short correctly rendered Chinese or English title text enclosed in quotation marks, strong silhouette at thumbnail size, and trim-safe breathing room for practical editorial use. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir tension and a contemporary publishing finish. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber. Typography: render the exact quoted title once in stark condensed sans-serif capitals and the exact quoted author once in small clean type; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, pr

沈黙の観覧車 — Japanese Thriller Cover

A stopped ferris wheel at night, one gondola lit, city dark below. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Japanese only; render the quoted title and author name in correct, complete Japanese characters. Book cover with title "沈黙の観覧車" and author name "高梨誠" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build a compelling genre-appropriate key image, readable title hierarchy, deliberately placed author name, short correctly rendered Chinese or English title text enclosed in quotation marks, strong silhouette at thumbnail size, and trim-safe breathing room for practical editorial use. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir tension and a contemporary publishing finish. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber. Typography: render the exact quoted title once in stark condensed sans-serif capitals and the exact quoted author once in small clean type; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book, book mockup, product moc

第七个房间 — Chinese Thriller Cover

A long corridor with seven doors, the seventh slightly open with cold light inside. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Chinese only; render the quoted title and author name in correct, complete simplified Chinese characters. Book cover with title "第七个房间" and author name "陆离" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build a compelling genre-appropriate key image, readable title hierarchy, deliberately placed author name, short correctly rendered Chinese or English title text enclosed in quotation marks, strong silhouette at thumbnail size, and trim-safe breathing room for practical editorial use. Style-specific direction: Style: premium mystery-thriller book cover with cinematic noir tension and a contemporary publishing finish. Subject: preserve the requested location, figure, clue, and era; center one charged visual mystery instead of unrelated crime props. Composition: portrait front-cover layout, bold silhouette or symbolic object, long visual corridor, generous title-safe upper area, strong thumbnail contrast. Lighting or Color: low-key light with one hard source and long shadows; slate blue, charcoal, and restrained sodium amber. Typography: render the exact quoted title once in stark condensed sans-serif capitals and the exact quoted author once in small clean type; keep both crisp and correctly spelled. Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, gore, police tape collage, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or cropped lettering.. Avoid: physical book, 3D book,

Premium mystery-thriller front cover titled "THE LAST LANTERN" by "MARA VALE", a lone figure on a foggy cobblestone street beneath a vintage street lamp.

最後のランタン — スリラー表紙

Thriller book cover: silhouette figure in rain, urban alley, single streetlight, dark atmospheric, bold sans-serif typography.