The Open Textbook Library provides access to free, openly-licensed textbooks that have been reviewed by faculty from various colleges and universities to assess their quality. The textbooks offered on the site are used at multiple higher education institutions throughout the country and many affiliated with an institution or professional organization. All textbooks can be adapted to your course needs. Textbooks can downloaded for no cost.
The Open Textbook Library is supported by the Center for Open Education and the Open Textbook Network.
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The Open Textbook Library is an OER repository.