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Used and new physical books with condition grades

A large network of book and research conversations

Used and rare books from independent booksellers

An open bibliographic database built by contributors

Monthly recommendations from independent booksellers

Real-time voice, video and AI agent SDKs for developers.

Free-literature browsing and ebook deal discovery

A compact catalogue of free classic ebooks

Long-form nonfiction and curated reading lists

Expert reading lists explained through interviews

AI tax research platform for complex federal, state, and cross-border questions.

Vibe Marketing platform for personalized messages.