{"schema_version":"bf_book_companion_v1","release_id":"20260406T231758Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/B0BVN1NKWN?tag=bookfrontier-20","asin":"B0BVN1NKWN","authors":["Clifford D. Simak"],"book_id":"9781649741912","canonical_url":"https://bookfrontier.com/books/9781649741912","cover_image_url":"https://img.bookfrontier.com/9781649741912.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","description":"Fifty-five pioneers had died on the “bridge of bones” that spanned the Void to the rusty plains of Mars. Now the fifty-sixth stood on the red planet, his only ship a total wreck—and knew that Earth was doomed unless he could send a warning within hours.","forthcoming":false,"isbn13":"9781649741912","publication_date":"20230228","publisher":"Start Publishing LLC","slug":"message-from-mars","subtitle":"Kindle Edition","title":"Message From Mars"},"discovery":{"categories":{"all":[{"bisac_code":"FIC028030","confidence_band":"medium","label":"Space Opera","score":0.8003,"source":"bisac_hint_model"},{"bisac_code":"FIC028020","confidence_band":"medium","label":"Hard Sci-Fi","score":0.7935,"source":"bisac_hint_model"},{"bisac_code":"FIC028010","confidence_band":"medium","label":"Sci-Fi Adventure","score":0.7919,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"FIC028030","confidence_band":"medium","label":"Space Opera","score":0.8003,"source":"bisac_hint_model"},{"bisac_code":"FIC028020","confidence_band":"medium","label":"Hard Sci-Fi","score":0.7935,"source":"bisac_hint_model"},{"bisac_code":"FIC028010","confidence_band":"medium","label":"Sci-Fi Adventure","score":0.7919,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"FIC028000","confidence_band":"high","label":"Sci-Fi","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC028010","confidence_band":"high","label":"Sci-Fi Adventure","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC028030","confidence_band":"high","label":"Space Opera","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Space Opera","score":0.8003,"slug":"space-opera"},{"label":"Hard Sci-Fi","score":0.7935,"slug":"hard-sci-fi"},{"label":"Sci-Fi Adventure","score":0.7919,"slug":"sci-fi-adventure"}],"reader_fit":["Good for readers who enjoy Space Opera","Good for readers interested in short stories","Good for fans of Science Fiction"],"related_lists":[{"intro":"","slug":"shelf-fic028030-science-fiction-space-opera","title":"Science Fiction Space Opera Books (fiction)","url":"https://bookfrontier.com/lists/shelf-fic028030-science-fiction-space-opera"},{"intro":"","slug":"shelf-fic028010-science-fiction-action-adventure","title":"Science Fiction Action & Adventure Books","url":"https://bookfrontier.com/lists/shelf-fic028010-science-fiction-action-adventure"},{"intro":"","slug":"shelf-fic028020-hard-science-fiction","title":"Hard Science Fiction Books","url":"https://bookfrontier.com/lists/shelf-fic028020-hard-science-fiction"}],"series":null,"similar_books":[{"authors":["Clifford D. Simak"],"book_id":"9781627930130","cover_image_url":"https://img.bookfrontier.com/9781627930130.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":24.2103,"title":"Project Mastodon","url":"https://bookfrontier.com/books/9781627930130"},{"authors":["Clifford D. Simak"],"book_id":"9781633557291","cover_image_url":"https://img.bookfrontier.com/9781633557291.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":24.105,"title":"The World That Couldn't Be","url":"https://bookfrontier.com/books/9781633557291"},{"authors":["Clifford D. Simak"],"book_id":"9781682991848","cover_image_url":"https://img.bookfrontier.com/9781682991848.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":24.0841,"title":"Second Childhood","url":"https://bookfrontier.com/books/9781682991848"},{"authors":["Keith Laumer"],"book_id":"9781625587329","cover_image_url":"https://img.bookfrontier.com/9781625587329.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":22.0313,"title":"Greylorn","url":"https://bookfrontier.com/books/9781625587329"},{"authors":["Hal Clement"],"book_id":"9781681465180","cover_image_url":"https://img.bookfrontier.com/9781681465180.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":21.7391,"title":"Hot Planet","url":"https://bookfrontier.com/books/9781681465180"},{"authors":["Ray Bradbury"],"book_id":"9798880918232","cover_image_url":"https://img.bookfrontier.com/9798880918232.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":21.7074,"title":"Monster Maker","url":"https://bookfrontier.com/books/9798880918232"},{"authors":["Harry Harrison"],"book_id":"9781681464961","cover_image_url":"https://img.bookfrontier.com/9781681464961.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":21.7001,"title":"The K-factor","url":"https://bookfrontier.com/books/9781681464961"},{"authors":["Poul Anderson","Herman B Vestal"],"book_id":"9781682995570","cover_image_url":"https://img.bookfrontier.com/9781682995570.jpg?v=20260406T231758Z%3A2026-04-06T23%3A17%3A58Z","score":21.6584,"title":"Lord of a Thousand Suns","url":"https://bookfrontier.com/books/9781682995570"}],"topics":[{"evidence_refs":["keyword:science fiction"],"label":"Science","score":0.2945,"slug":"science"},{"evidence_refs":["phrase_map_match"],"label":"Short Stories","score":0.0624,"slug":"short-story"},{"evidence_refs":["keyword:space exploration"],"label":"Space","score":0.0595,"slug":"space"}],"what_you_get":["Themes: Science, Short Stories, Space.","Reading lane: Space Opera and Hard Sci Fi.","Publisher: Start Publishing LLC."]},"llm_signals":null,"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":false,"similarity_seed":true},"stats":{"amazon_ratings_count":0,"goodreads_ratings_count":28,"goodreads_reviews_count":7,"quality_score":0.849}}