{"schema_version":"bf_book_companion_v1","release_id":"20260418T162306Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/0306824523?tag=bookfrontier-20","asin":"0306824523","authors":["Brian Murphy"],"book_id":"9780306824524","canonical_url":"https://bookfrontier.com/books/81-days-below-zero-0306824523","cover_image_url":"https://img.bookfrontier.com/9780306824524.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","description":"\"A riveting...saga of survival against formidable odds\" ( Washington Post ) about one man who survived a World War II plane crash in Alaska's harsh Yukon territory Shortly before Christmas in 1943, five Army aviators left Alaska's Ladd Field on a routine flight to test their hastily retrofitted B-24 Liberator in harsh winter conditions. The mission ended in a crash that claimed all but one-Leon Crane, a city kid from Philadelphia with no wilderness experience. With little more than a parachute for cover and an old Boy Scout knife in his pocket, Crane found himself alone in subzero temperatures. 81 Days Below Zero recounts, for the first time, the full story of Crane's remarkable twelve-week saga.","forthcoming":false,"isbn13":"9780306824524","publication_date":"20160301","publisher":"Grand Central Publishing","slug":"81-days-below-zero","subtitle":"The Incredible Survival Story of a World War II Pilot in Alaska's Frozen Wilderness","title":"81 Days Below Zero"},"discovery":{"categories":{"all":[{"bisac_code":"HIS027100","confidence_band":"medium","label":"World War II History","score":0.7183,"source":"bisac_hint_model"},{"bisac_code":"NAT045030","confidence_band":"medium","label":"Polar Worlds","score":0.7102,"source":"bisac_hint_model"},{"bisac_code":"HIS027140","confidence_band":"medium","label":"Military Aviation","score":0.7066,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"HIS027100","confidence_band":"medium","label":"World War II History","score":0.7183,"source":"bisac_hint_model"},{"bisac_code":"NAT045030","confidence_band":"medium","label":"Polar Worlds","score":0.7102,"source":"bisac_hint_model"},{"bisac_code":"HIS027140","confidence_band":"medium","label":"Military Aviation","score":0.7066,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"BIO008000","confidence_band":"high","label":"Military Lives","score":1,"source":"onix_publisher_code"},{"bisac_code":"HIS027100","confidence_band":"high","label":"World War II History","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"World War II History","score":0.7183,"slug":"world-war-ii-history"},{"label":"Polar Worlds","score":0.7102,"slug":"polar-worlds"},{"label":"Military Aviation","score":0.7066,"slug":"military-aviation"}],"reader_fit":["Good for readers who enjoy World War II History","Good for readers interested in survival","Good for readers who enjoy World War II History and Polar Worlds."],"related_lists":[],"series":null,"similar_books":[{"authors":["Mitchell Zuckoff"],"book_id":"9780062133403","cover_image_url":"https://img.bookfrontier.com/9780062133403.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":16.3338,"title":"Frozen in Time","url":"https://bookfrontier.com/books/9780062133403"},{"authors":["John R Bruning"],"book_id":"9780316508650","cover_image_url":"https://img.bookfrontier.com/9780316508650.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":12.3768,"title":"Fifty-three Days on Starvation Island","url":"https://bookfrontier.com/books/9780316508650"},{"authors":["Adam Makos","Larry Alexander"],"book_id":"9780425255735","cover_image_url":"https://img.bookfrontier.com/9780425255735.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":12.2872,"title":"A Higher Call","url":"https://bookfrontier.com/books/9780425255735"},{"authors":["Gregory A. Freeman"],"book_id":"9780451224958","cover_image_url":"https://img.bookfrontier.com/9780451224958.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.9116,"title":"The Forgotten 500","url":"https://bookfrontier.com/books/9780451224958"},{"authors":["Donald L. Miller"],"book_id":"9780743235457","cover_image_url":"https://img.bookfrontier.com/9780743235457.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.4071,"title":"Masters of the Air","url":"https://bookfrontier.com/books/9780743235457"},{"authors":["Jan Cress Dondi"],"book_id":"9781454956358","cover_image_url":"https://img.bookfrontier.com/9781454956358.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.2606,"title":"The Navigator's Letter","url":"https://bookfrontier.com/books/9781454956358"},{"authors":["Bob Drury","Tom Clavin"],"book_id":"9781476774855","cover_image_url":"https://img.bookfrontier.com/9781476774855.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.2546,"title":"Lucky 666","url":"https://bookfrontier.com/books/9781476774855"},{"authors":["Harry H. Crosby","Chris Monteiro","Tantor Audio","& 0 more"],"book_id":"9781504067331","cover_image_url":"https://img.bookfrontier.com/9781504067331.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.2145,"title":"A Wing and a Prayer","url":"https://bookfrontier.com/books/9781504067331"}],"topics":[{"evidence_refs":["keyword:world war ii"],"label":"World","score":0.2022,"slug":"world"},{"evidence_refs":["keyword:adventure"],"label":"Adventure","score":0.135,"slug":"adventure"},{"evidence_refs":["keyword:survival"],"label":"Survival","score":0.0574,"slug":"survival"}],"what_you_get":["Themes: Adventure, Survival.","Reading lane: World War Ii History and Polar Worlds.","Publisher: Grand Central Publishing."]},"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":3542,"goodreads_reviews_count":375,"quality_score":0.9305}}