{"schema_version":"bf_book_companion_v1","release_id":"20260417T204117Z-pairingsrefresh","book":{"amazon_purchase_url":"https://www.amazon.com/dp/1638587396?tag=bookfrontier-20","asin":"1638587396","authors":["Haruki"],"book_id":"9781638587392","canonical_url":"https://bookfrontier.com/books/ero-ninja-scrolls-vol-4-1638587396","cover_image_url":"https://img.bookfrontier.com/9781638587392.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","description":"TWO’S COMPANY, SEVEN’S…ALSO COMPANY! To better defend the lovely if somewhat sticky city of Ero, Arakusa and her new disciple Tokuta engage in special sexual training, only to become obsessed with it! And who else is obsessed with sex, and with Arakusa, but the devilish Western ninja from the Black Ships? They threaten Ero’s fragile peace, and plenty of other fragile things too, in this latest erotic alternative history adventure!","forthcoming":false,"isbn13":"9781638587392","publication_date":"20221129","publisher":"Seven Seas Entertainment","slug":"ero-ninja-scrolls-vol-4","subtitle":"","title":"Ero Ninja Scrolls Vol. 4"},"discovery":{"categories":{"all":[{"bisac_code":"CGN004110","confidence_band":"high","label":"Erotic Manga","score":0.866,"source":"bisac_hint_model"},{"bisac_code":"CGN004300","confidence_band":"medium","label":"Isekai Manga","score":0.8198,"source":"bisac_hint_model"},{"bisac_code":"CGN004050","confidence_band":"medium","label":"General Manga","score":0.8094,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"CGN004110","confidence_band":"high","label":"Erotic Manga","score":0.866,"source":"bisac_hint_model"},{"bisac_code":"CGN004300","confidence_band":"medium","label":"Isekai Manga","score":0.8198,"source":"bisac_hint_model"},{"bisac_code":"CGN004050","confidence_band":"medium","label":"General Manga","score":0.8094,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"CGN004110","confidence_band":"high","label":"Erotic Manga","score":1,"source":"onix_publisher_code"},{"bisac_code":"CGN010000","confidence_band":"high","label":"Comics & Graphic Novels / Historical Fiction","score":1,"source":"onix_publisher_code"},{"bisac_code":"CGN018000","confidence_band":"high","label":"COMICS & GRAPHIC NOVELS / Action & Adventure","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Erotic Manga","score":0.866,"slug":"erotic-manga"},{"label":"Isekai Manga","score":0.8198,"slug":"isekai-manga"},{"label":"General Manga","score":0.8094,"slug":"general-manga"}],"reader_fit":["Good for readers who enjoy Erotic Manga","Good for readers interested in adventure","Good for fans of Manga"],"related_lists":[{"intro":"","slug":"shelf-cgn004300-isekai","title":"Isekai Books","url":"https://bookfrontier.com/lists/shelf-cgn004300-isekai"},{"intro":"","slug":"shelf-cgn004110-manga-erotica","title":"Manga Erotica Books","url":"https://bookfrontier.com/lists/shelf-cgn004110-manga-erotica"}],"series":null,"similar_books":[{"authors":["Haruki"],"book_id":"9781638582762","cover_image_url":"https://img.bookfrontier.com/9781638582762.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":30.4186,"title":"Ero Ninja Scrolls Vol. 3","url":"https://bookfrontier.com/books/9781638582762"},{"authors":["Haruki"],"book_id":"9781685795573","cover_image_url":"https://img.bookfrontier.com/9781685795573.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":27.2166,"title":"Ero Ninja Scrolls Vol. 5","url":"https://bookfrontier.com/books/9781685795573"},{"authors":["Haruki"],"book_id":"9798888430835","cover_image_url":"https://img.bookfrontier.com/9798888430835.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":24.7967,"title":"Ero Ninja Scrolls Vol. 6","url":"https://bookfrontier.com/books/9798888430835"},{"authors":["Haruki"],"book_id":"9798895616727","cover_image_url":"https://img.bookfrontier.com/9798895616727.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":24.7577,"title":"Ero Ninja Scrolls Vol. 9","url":"https://bookfrontier.com/books/9798895616727"},{"authors":["Masahiro Morio"],"book_id":"9781638581925","cover_image_url":"https://img.bookfrontier.com/9781638581925.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":18.9841,"title":"Call Girl in Another World Vol. 4","url":"https://bookfrontier.com/books/9781638581925"},{"authors":["Masahiro Morio"],"book_id":"9781638583479","cover_image_url":"https://img.bookfrontier.com/9781638583479.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":18.9461,"title":"Call Girl in Another World Vol. 5","url":"https://bookfrontier.com/books/9781638583479"},{"authors":["Kakeru"],"book_id":"9781648275029","cover_image_url":"https://img.bookfrontier.com/9781648275029.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":18.9421,"title":"Into the Deepest, Most Unknowable Dungeon Vol. 2","url":"https://bookfrontier.com/books/9781648275029"},{"authors":["Lynn Okamoto"],"book_id":"9781648275128","cover_image_url":"https://img.bookfrontier.com/9781648275128.jpg?v=20260417T204117Z-pairingsrefresh%3A2026-04-17T20%3A41%3A17Z","score":18.9381,"title":"Parallel Paradise Vol. 8","url":"https://bookfrontier.com/books/9781648275128"}],"topics":[{"evidence_refs":["keyword:manga books"],"label":"Manga","score":0.1399,"slug":"manga"},{"evidence_refs":["keyword:adventure"],"label":"Adventure","score":0.135,"slug":"adventure"},{"evidence_refs":["keyword:japanese"],"label":"Japanese","score":0.0684,"slug":"japanese"},{"evidence_refs":["keyword:nerd"],"label":"Nerd","score":0.0529,"slug":"nerd"},{"evidence_refs":["keyword:geek"],"label":"Geek","score":0.0448,"slug":"geek"}],"what_you_get":["Themes: Manga, Adventure, Japanese.","Reading lane: Erotic Manga and Isekai Manga.","Publisher: Seven Seas Entertainment."]},"llm_signals":null,"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":false,"similarity_seed":true},"stats":{"amazon_ratings_count":41,"goodreads_ratings_count":21,"goodreads_reviews_count":4,"quality_score":0.8541}}