The Open Textbook LibrarySearchable collection of open textbooks that have been funded, published, and licensed to be freely used, adapted, and distributed. These books have been reviewed by faculty from a variety of colleges and universities to assess their quality. These books can be downloaded for no cost, or printed at a low cost. All textbooks are either used at multiple higher education institutions; or affiliated with an institution, scholarly society, or professional organization.
All books in the Open Textbook Library have an open license, are complete textbooks, and are available as a portable file (e.g. PDF, ePub).
The Open Textbook Library is supported by the Center for Open Education and the Open Textbook Network.