Since 2012, OpenStax has created peer-reviewed, openly licensed textbooks, which are available in free digital formats and for a low cost in print.

[9] OpenStax textbooks follow a traditional peer review process aimed at ensuring they meet a high quality standard before publication.

Textbooks are developed and peer-reviewed by educators in an attempt to ensure they are readable and accurate, meet the scope and sequence requirements of each course, are supported by instructor ancillaries, and are available with the latest technology-based learning tools.

However, notwithstanding the peer-review process, the books have come under criticism for the large numbers of typos and other errors they contain.

[citation needed] The free, online version of OpenStax books are kept up-to-date on an ongoing basis.