Find OER by Subject
Open textbooks are textbooks that have been funded, published, and licensed to be freely used, adapted, and distributed. These books have been reviewed to assess their quality and can be downloaded at no cost. All textbooks are either used at multiple higher education institutions; or affiliated with an institution, scholarly society, or professional organization. The link includes all subjects and you can select a subject of interest by highlighting Browse Subjects. Visit the Open Textbook Library