{"schema_version":"bf_book_companion_v1","release_id":"20260417T232332Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/B002ULA20U?tag=bookfrontier-20","asin":"B002ULA20U","authors":["Mike Shepherd","Dina Pearlman","Audible Studios","& 0 more"],"book_id":"9780441017867","canonical_url":"https://bookfrontier.com/books/kris-longknife-undaunted-B002ULA20U","cover_image_url":"https://img.bookfrontier.com/9780441017867.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","description":"Kris Longknife encounters some peaceful aliens who have come to warn humanity of an unidentifiable force that is roaming the galaxy, obliterating everything in its path-a path now leading directly toward the human worlds.","forthcoming":false,"isbn13":"9780441017867","publication_date":"20091027","publisher":"Penguin Publishing Group","slug":"kris-longknife-undaunted","subtitle":"","title":"Kris Longknife: Undaunted"},"discovery":{"categories":{"all":[{"bisac_code":"FIC028030","confidence_band":"medium","label":"Space Opera","score":0.7956,"source":"bisac_hint_model"},{"bisac_code":"FIC028090","confidence_band":"medium","label":"Alien Contact","score":0.7955,"source":"bisac_hint_model"},{"bisac_code":"FIC028050","confidence_band":"medium","label":"Military Sci-Fi","score":0.793,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"FIC028030","confidence_band":"medium","label":"Space Opera","score":0.7956,"source":"bisac_hint_model"},{"bisac_code":"FIC028090","confidence_band":"medium","label":"Alien Contact","score":0.7955,"source":"bisac_hint_model"},{"bisac_code":"FIC028050","confidence_band":"medium","label":"Military Sci-Fi","score":0.793,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"FIC002000","confidence_band":"high","label":"Action & Adventure","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC028010","confidence_band":"high","label":"Sci-Fi Adventure","score":1,"source":"onix_publisher_code"},{"bisac_code":"FIC028090","confidence_band":"high","label":"Alien Contact","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Space Opera","score":0.7956,"slug":"space-opera"},{"label":"Alien Contact","score":0.7955,"slug":"alien-contact"},{"label":"Military Sci-Fi","score":0.793,"slug":"military-sci-fi"}],"reader_fit":["Good for readers who enjoy Space Opera","Good for readers interested in science","Good for fans of Science Fiction"],"related_lists":[{"intro":"Big-canvas speculative stories where first contact drives the stakes.","slug":"between-the-shelves-space-opera-alien-contact","title":"Space Opera and Alien Contact Books","url":"https://bookfrontier.com/lists/between-the-shelves-space-opera-alien-contact"},{"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-fic028090-science-fiction-alien-contact","title":"Science Fiction Alien Contact Books","url":"https://bookfrontier.com/lists/shelf-fic028090-science-fiction-alien-contact"},{"intro":"","slug":"shelf-fic028050-science-fiction-military","title":"Science Fiction Military Books","url":"https://bookfrontier.com/lists/shelf-fic028050-science-fiction-military"}],"series":null,"similar_books":[{"authors":["E. E. Knight","Christian Rummel","E. E. Knight (Introduction)","Audible Studios"],"book_id":"9780451462190","cover_image_url":"https://img.bookfrontier.com/9780451462190.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":20.8522,"title":"Valentine's Resolve","url":"https://bookfrontier.com/books/9780451462190"},{"authors":["John Love"],"book_id":"9781597803915","cover_image_url":"https://img.bookfrontier.com/9781597803915.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":19.2841,"title":"Faith","url":"https://bookfrontier.com/books/9781597803915"},{"authors":["A.E. van Vogt"],"book_id":"9781649742124","cover_image_url":"https://img.bookfrontier.com/9781649742124.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":18.5055,"title":"The Expendables","url":"https://bookfrontier.com/books/9781649742124"},{"authors":["Elizabeth Bear"],"book_id":"9781534402997","cover_image_url":"https://img.bookfrontier.com/9781534402997.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":18.4917,"title":"Ancestral Night","url":"https://bookfrontier.com/books/9781534402997"},{"authors":["William C. Dietz"],"book_id":"9781647101251","cover_image_url":"https://img.bookfrontier.com/9781647101251.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":18.4779,"title":"Andromeda's Fall: a Novel of the Legion of the Damned","url":"https://bookfrontier.com/books/9781647101251"},{"authors":["Andre Norton"],"book_id":"9781682991770","cover_image_url":"https://img.bookfrontier.com/9781682991770.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":18.4512,"title":"Storm Over Warlock","url":"https://bookfrontier.com/books/9781682991770"},{"authors":["James S. A. Corey"],"book_id":"9780316525558","cover_image_url":"https://img.bookfrontier.com/9780316525558.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":16.87,"title":"The Mercy of Gods","url":"https://bookfrontier.com/books/9780316525558"},{"authors":["Neal Asher"],"book_id":"9781627933100","cover_image_url":"https://img.bookfrontier.com/9781627933100.jpg?v=20260417T232332Z%3A2026-04-17T23%3A23%3A32Z","score":16.8623,"title":"Prador Moon","url":"https://bookfrontier.com/books/9781627933100"}],"topics":[{"evidence_refs":["keyword:science fiction"],"label":"Science","score":0.2945,"slug":"science"},{"evidence_refs":["keyword:adventure"],"label":"Adventure","score":0.135,"slug":"adventure"},{"evidence_refs":["keyword:action adventure"],"label":"Action","score":0.0669,"slug":"action"},{"evidence_refs":["keyword:survival"],"label":"Survival","score":0.0574,"slug":"survival"}],"what_you_get":["Themes: Science, Adventure, Action.","Reading lane: Space Opera and Alien Contact.","Publisher: Penguin Publishing Group."]},"llm_signals":null,"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":false,"similarity_seed":true},"stats":{"amazon_ratings_count":567,"goodreads_ratings_count":2904,"goodreads_reviews_count":72,"quality_score":0.9299}}