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OpenStax

Free, peer-reviewed college textbooks.

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Oct 28, 2026
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openstax.org

OpenStax, from Rice University, publishes free, peer-reviewed college textbooks that you can read online or download as PDFs.

Why it is worth a bookmark

  • Study college subjects without buying textbooks
  • Use them in high school or university courses
  • Download PDFs to read offline
  • Find teacher resources

Good to know

Low-cost printed copies are available if you prefer paper. Books are licensed under Creative Commons, so teachers can adapt them.