Flat World Knowledge – remixable textbooks by expert authors, free online and affordable off.

A New Approach to College Textbooks. Finally.
We preserve the best of the old – books by leading experts, rigorously reviewed and developed to the highest standards. Then we flip it all on its head.
Our peer-reviewed book are written by experts, professionally developed, & supported by supplements. There the similarity to traditional books ends. Our books are free online, purchasable in multiple formats (softcover, audio, self-print versions) & open-source so you can modify them to fit your course. Hit our catalog or read on.
Our books are free online. We offer convenient, low-cost choices for students – softcovers for under $30, audio books and chapters, self-print options, and more. Our books are open for instructors to modify and make their own (for their own course – not for anybody else’s). Our books are the hub of a social learning network where students learn from the book and each other.
(Link: Flat World Knowledge – remixable textbooks by expert authors, free online and affordable off.)