Open textbooks are 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.
The collection contains monographs and textbooks in all areas, and offer the academic excellence of a traditional press, with the speed, convenience and accessibility of digital publishing. All books are available to read for free online."Books are published in hardback, paperback and ebook editions, but we also publish free online editions of every title in PDF, HTML and XML formats that can be read via our website, downloaded, reused or embedded anywhere."
Lumen provides open courses in a variety of high-demand subjects and disciplines. These courses are collections of high-quality OER, not necessarily traditional textbooks. You can use them as-is or modify them to fit your instructional style and students’ needs.