OpenStax is a non-profit organization that produces high-quality, peer-reviewed textbooks and educational resources that are available for free to students and educators around the world. Their mission is to make education more affordable and accessible for all learners, regardless of their background or financial circumstances. OpenStax textbooks cover a wide range of subjects, from mathematics and science to social sciences and humanities, and have been used by millions of students worldwide. To explore the platform, please visit their website at https://openstax.org/