Open Educational Resources (OER): Books

The primary aim of DOAB is to increase discoverability of Open Access books.

IntechOpen is specifically for scientists. It is the the world's leading publisher of Open Access books. In addition, their books are submitted to relevant abstracting and indexing services including Web of Science - Book Citation Index, Crossref, Google Scholar, WorldCat, BASE, EBSCO A-to-Z, Open AIRE, CNKI Scholar, RePEc, ExLibris SFX.

OASIS currently searches open content from 117 different sources and contains 388,707 records.

Their goal is to provide a page on the web for every book ever published. At its heart, Open Library is a catalog.

OpenStax publishes high-quality, peer-reviewed, openly licensed textbooks that are absolutely free online and low cost in print. For all our available formats, visit openstax.org and select the subject that interests you.

Open textbooks are licensed by authors and publishers to be freely used and adapted. Download, edit and distribute them at no cost.
The Open Textbook Library is supported by the Open Education Network

Saylor Academy has textbooks available by subject that are reproduced without attribution to the authors or original publisher, as requested by the licensor, and are available under a CC BY-NC-SA 3.0 license. PDF copies are available (under slightly different titles) at the 2012 Book Archive. Many of these titles are also available in various formats through the Open Textbook Library and BCcampus. Saylow Academy also contains free certification courses, courses built from curated OER, and for-credit courses.