Book categories searchable with the Amazon API are distinguished by numbers called BrowseNode.

The following are the top-level categories, which are further divided into detailed subcategories:

466284 -> Literature & Criticism
571582 -> Humanities & Philosophy
571584 -> Society & Politics
492152 -> Nonfiction
466286 -> History & Geography
466282 -> Business & Economics
492054 -> Investment, Finance & Corporate Management
466290 -> Science & Technology
492166 -> Medicine & Pharmacy
466298 -> Computers & IT
466294 -> Art, Architecture & Design
466292 -> Practical, Sports & Hobbies
492228 -> Qualifications & Examinations
466304 -> Lifestyle, Health & Childcare
492090 -> Travel Guides
466302 -> Languages, Dictionaries & Yearbooks
3148931 -> Education, Study Guides & Entrance Exams
466306 -> Children
466280 -> Manga, Anime & BL
500592 -> Celebrity Photo Books
492266 -> Game Strategy Guides
466296 -> Entertainment
466300 -> Paperbacks & Pocket Books
13384021 -> Magazines
746102 -> Sheet Music, Scores & Music Books
255460011 -> Used Books
886928 -> Calendars
13383771 -> Posters
10667101 -> Adult

【Reference】

・BrowseNode List Acquisition Tool | Mitsurin

・BrowseNode= List Top

・Detailed Category Specification (BrowseNode) - Product Search (ItemSearch) - Amazon Web Services

That’s all from the Gemba.