OpenStax textbooks are available as FREE downloads in PDF, Web, and EPUB formats. The textbooks are 100 percent free, Peer-Reviewed, and Openly Licensed. Currently, 90 textbooks are available.
What is OpenStax?
It Is a Rice University initiative that promotes the use of free textbooks that are easily accessible to both college students and high school students and offers AP and Undergraduate textbooks that make up a core part of many curriculums that taught throughout the United States. Openstax has partnered with the Bill and Melinda Gates Foundation, National Science Foundation, and Google.
