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All of these repositories and publishers offer books in the public domain, open educational resources, or otherwise fully open access materials. This means all of these sources are operating fully according to copyright law.

Open Access Libraries

Open Research Library (online research library)

Internet Archive (online library and web archive)

Project Gutenberg (public domain books)

Open Access Book Publishers

Directory of Open Access Books (directory of open access publications)

Open Book Publishers (social studies and humanities publications)

OAPEN (online library of open access academic publications)

dBooks Library (open book repository mostly covering academic and technical subjects)

Open Access Textbooks

Open Textbook Library (collection of many open access university textbooks)

OER Commons (repository of other open access textbook libraries)

Runestone Academy (math and computer science textbooks)

LibreTexts (collection of many open access university textbooks)

OpenStax (from Rice University)

Milne Open Textbooks (from SUNY)

Pressbooks (platform of many North American university textbooks)

Malcolm X and Maya Angelou.