{"schema_version":"bf_book_companion_v1","release_id":"20260418T162306Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/1421543273?tag=bookfrontier-20","asin":"1421543273","authors":["Naoki Urasawa"],"book_id":"9781421543277","canonical_url":"https://bookfrontier.com/books/naoki-urasawa-s-21st-century-boys-vol-2-1421543273","cover_image_url":"https://img.bookfrontier.com/9781421543277.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","description":"The climax of our story is finally at hand! Mankind faces a crisis, and Kenji is hustling to save the world and the people he loves. But he also must solve the mystery of the Friend. Who is he and why did he become evil? The answer is tied to a memory Kenji has from when he was a twentieth century boy. Reads R to L (Japanese Style).","forthcoming":false,"isbn13":"9781421543277","publication_date":"20130319","publisher":"VIZ Media LLC","slug":"naoki-urasawa-s-21st-century-boys-vol-2","subtitle":"","title":"Naoki Urasawa's 21st Century Boys, Vol. 2"},"discovery":{"categories":{"all":[{"bisac_code":"CGN004100","confidence_band":"medium","label":"Crime Manga","score":0.8145,"source":"bisac_hint_model"},{"bisac_code":"CGN004190","confidence_band":"medium","label":"Science Fiction Manga","score":0.8109,"source":"bisac_hint_model"},{"bisac_code":"CGN004050","confidence_band":"medium","label":"General Manga","score":0.792,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"CGN004100","confidence_band":"medium","label":"Crime Manga","score":0.8145,"source":"bisac_hint_model"},{"bisac_code":"CGN004190","confidence_band":"medium","label":"Science Fiction Manga","score":0.8109,"source":"bisac_hint_model"},{"bisac_code":"CGN004050","confidence_band":"medium","label":"General Manga","score":0.792,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"CGN004050","confidence_band":"high","label":"General Manga","score":1,"source":"onix_publisher_code"},{"bisac_code":"CGN004100","confidence_band":"high","label":"Crime Manga","score":1,"source":"onix_publisher_code"},{"bisac_code":"CGN004190","confidence_band":"high","label":"Science Fiction Manga","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Crime Manga","score":0.8145,"slug":"crime-manga"},{"label":"Science Fiction Manga","score":0.8109,"slug":"science-fiction-manga"},{"label":"General Manga","score":0.792,"slug":"general-manga"}],"reader_fit":["Good for readers who enjoy Crime Manga","Good for fans of Manga","Good for readers who enjoy Crime Manga and Science Fiction Manga."],"related_lists":[],"series":null,"similar_books":[{"authors":["Naoki Urasawa"],"book_id":"9781421599717","cover_image_url":"https://img.bookfrontier.com/9781421599717.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.5339,"title":"20th Century Boys: the Perfect Edition, Vol. 11","url":"https://bookfrontier.com/books/9781421599717"},{"authors":["Naoki Urasawa","Takashi Nagasaki","Akemi Wegmüller"],"book_id":"9781421599687","cover_image_url":"https://img.bookfrontier.com/9781421599687.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.5188,"title":"20th Century Boys: the Perfect Edition, Vol. 8","url":"https://bookfrontier.com/books/9781421599687"},{"authors":["Naoki Urasawa"],"book_id":"9781421599663","cover_image_url":"https://img.bookfrontier.com/9781421599663.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.5108,"title":"20th Century Boys: the Perfect Edition, Vol. 6","url":"https://bookfrontier.com/books/9781421599663"},{"authors":["Naoki Urasawa","Takashi Nagasaki","Akemi Wegmüller"],"book_id":"9781421599670","cover_image_url":"https://img.bookfrontier.com/9781421599670.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":11.5095,"title":"20th Century Boys: the Perfect Edition, Vol. 7","url":"https://bookfrontier.com/books/9781421599670"},{"authors":["Yuto Sano"],"book_id":"9781974743568","cover_image_url":"https://img.bookfrontier.com/9781974743568.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":9.2623,"title":"Gokurakugai, Vol. 1","url":"https://bookfrontier.com/books/9781974743568"},{"authors":["Tatsuki Fujimoto"],"book_id":"9781974762231","cover_image_url":"https://img.bookfrontier.com/9781974762231.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":9.2246,"title":"Chainsaw Man, Vol. 20","url":"https://bookfrontier.com/books/9781974762231"},{"authors":["Tatsuki Fujimoto"],"book_id":"9781974758548","cover_image_url":"https://img.bookfrontier.com/9781974758548.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":9.1966,"title":"Chainsaw Man, Vol. 19","url":"https://bookfrontier.com/books/9781974758548"},{"authors":["Strike Tanaka"],"book_id":"9781626921832","cover_image_url":"https://img.bookfrontier.com/9781626921832.jpg?v=20260418T162306Z%3A2026-04-19T10%3A16%3A55Z","score":9.1811,"title":"Servamp Vol. 3","url":"https://bookfrontier.com/books/9781626921832"}],"topics":[],"what_you_get":["Reading lane: Crime Manga and Science Fiction Manga.","Publisher: VIZ Media LLC."]},"llm_signals":null,"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":false,"similarity_seed":true},"stats":{"amazon_ratings_count":9,"goodreads_ratings_count":1411,"goodreads_reviews_count":129,"quality_score":0.9187}}