{"schema_version":"bf_book_companion_v1","release_id":"20260414T102527Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/0063458772?tag=bookfrontier-20","asin":"0063458772","authors":["Ross Montgomery"],"book_id":"9780063458772","canonical_url":"https://bookfrontier.com/books/9780063458772","cover_image_url":"https://img.bookfrontier.com/9780063458772.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","description":"Knives Out meets Downton Abbey ! Secrets, murder, and mayhem collide as this unlikely sleuthing duo — an under-butler and a foul-mouthed octogenarian — hunt a killer in a manor sealed against the end of the world, in this locked-room mystery by #1 New York Times bestselling author Ross Montgomery. Cornwall, 1910. On a remote tidal island, the Viscount of Tithe Hall is absorbed in feverish preparations for the apocalypse that he believes will accompany the passing of Halley's Comet. The Hall must be sealed from top to bottom—every window, chimney, and keyhole closed off before night falls. But what the pompous, dishonest Viscount has failed to take into account is the danger that lies within... By morning, he will be dead in his sealed study, murdered by his own ancestral crossbow. All eyes turn to Steven Pike, Tithe Hall's newest under-butler. Fresh out of Borstal for a crime he didn't commit, he is the wrong man in the wrong place at the wrong time. His unlikely ally? Miss Decima Stockingham, the foul-mouthed, sharp as a tack, eighty-year-old family matriarch. Fearless and unconventional, she relishes chaos and puzzles alike, and a murder is just the thrill she's been waiting for. Together, this mismatched duo must navigate secret passages, buried grudges, and rising terror to unmask the killer before it's too late...","forthcoming":false,"isbn13":"9780063458772","publication_date":"20260106","publisher":"HarperCollins","slug":"the-murder-at-world-s-end","subtitle":"A Novel","title":"The Murder at World's End"},"discovery":{"categories":{"all":[{"bisac_code":"FIC022070","confidence_band":"medium","label":"Cozy Mysteries","score":0.8438,"source":"bisac_hint_model"},{"bisac_code":"FIC022100","confidence_band":"medium","label":"Amateur Sleuths","score":0.8376,"source":"bisac_hint_model"},{"bisac_code":"FIC022030","confidence_band":"medium","label":"British Mystery","score":0.8332,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"FIC022070","confidence_band":"medium","label":"Cozy Mysteries","score":0.8438,"source":"bisac_hint_model"},{"bisac_code":"FIC022100","confidence_band":"medium","label":"Amateur Sleuths","score":0.8376,"source":"bisac_hint_model"},{"bisac_code":"FIC022030","confidence_band":"medium","label":"British Mystery","score":0.8332,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"FIC022000","confidence_band":"high","label":"Mystery","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC022040","confidence_band":"high","label":"Women Detectives","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC022060","confidence_band":"high","label":"Historical Mystery","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC022070","confidence_band":"high","label":"Cozy Mysteries","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC022100","confidence_band":"high","label":"Amateur Sleuths","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC060000","confidence_band":"high","label":"Dark Humor","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Cozy Mysteries","score":0.8438,"slug":"cozy-mysteries"},{"label":"Amateur Sleuths","score":0.8376,"slug":"amateur-sleuths"},{"label":"British Mystery","score":0.8332,"slug":"british-mystery"}],"reader_fit":["Good for readers who enjoy Cozy Mysteries","Good for readers interested in mystery","Good for fans of Mystery"],"related_lists":[{"intro":"","slug":"shelf-fic022070-mystery-detective-cozy","title":"Mystery & Detective Cozy Books","url":"https://bookfrontier.com/lists/shelf-fic022070-mystery-detective-cozy"},{"intro":"","slug":"shelf-fic022100-amateur-sleuth","title":"Amateur Sleuth Books","url":"https://bookfrontier.com/lists/shelf-fic022100-amateur-sleuth"},{"intro":"","slug":"shelf-fic022030-traditional-british","title":"Traditional British Books","url":"https://bookfrontier.com/lists/shelf-fic022030-traditional-british"}],"series":null,"similar_books":[{"authors":["Christianna Brand"],"book_id":"9781453236741","cover_image_url":"https://img.bookfrontier.com/9781453236741.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":19.4025,"title":"Fog of Doubt","url":"https://bookfrontier.com/books/9781453236741"},{"authors":["Robert Thorogood"],"book_id":"9781464236808","cover_image_url":"https://img.bookfrontier.com/9781464236808.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":17.7594,"title":"Murder on the Marlow Belle","url":"https://bookfrontier.com/books/9781464236808"},{"authors":["Robert Thorogood"],"book_id":"9781728284477","cover_image_url":"https://img.bookfrontier.com/9781728284477.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":17.3539,"title":"The Queen of Poisons","url":"https://bookfrontier.com/books/9781728284477"},{"authors":["Mel Pennant"],"book_id":"9780593701621","cover_image_url":"https://img.bookfrontier.com/9780593701621.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":17.3456,"title":"A Murder for Miss Hortense","url":"https://bookfrontier.com/books/9780593701621"},{"authors":["Martha Grimes","Steve West","Audible Studios","& 0 more"],"book_id":"9780451220721","cover_image_url":"https://img.bookfrontier.com/9780451220721.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":16.8649,"title":"The Old Wine Shades","url":"https://bookfrontier.com/books/9780451220721"},{"authors":["Janice Hallett"],"book_id":"9781668083536","cover_image_url":"https://img.bookfrontier.com/9781668083536.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":16.6265,"title":"The Killer Question","url":"https://bookfrontier.com/books/9781668083536"},{"authors":["Daryl Wood Gerber"],"book_id":"9781496748201","cover_image_url":"https://img.bookfrontier.com/9781496748201.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":16.5869,"title":"Murder by the Millions","url":"https://bookfrontier.com/books/9781496748201"},{"authors":["Chrystal Schleyer"],"book_id":"9780778387954","cover_image_url":"https://img.bookfrontier.com/9780778387954.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","score":16.5547,"title":"A Rather Peculiar Poisoning","url":"https://bookfrontier.com/books/9780778387954"}],"topics":[{"evidence_refs":["keyword:quirky mystery"],"label":"Mystery","score":0.2702,"slug":"mystery"},{"evidence_refs":["keyword:old school murder mystery"],"label":"School","score":0.1148,"slug":"school"},{"evidence_refs":["keyword:old school murder mystery"],"label":"Murder","score":0.0798,"slug":"murder"},{"evidence_refs":["keyword:funny locked room mysteries"],"label":"Mysteries","score":0.0634,"slug":"mysteries"},{"evidence_refs":["keyword:detective books"],"label":"Detective","score":0.0458,"slug":"detective"}],"what_you_get":["Themes: Mystery, School, Murder.","Reading lane: Cozy Mysteries and Amateur Sleuths.","Publisher: HarperCollins."]},"llm_signals":null,"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":false,"similarity_seed":true},"stats":{"amazon_ratings_count":858,"goodreads_ratings_count":6691,"goodreads_reviews_count":1251,"quality_score":0.9738}}