Open Stax (Textbooks) This link opens in a new window
"OpenStax is a nonprofit educational initiative based at Rice University. ... Using OpenStax is simple! [For faculty] Review the textbook online, and if you decide to use it in your class, let us know. To access faculty-only materials, you can create an OpenStax account and request faculty access. Once we manually verify that you’re an instructor, you will have access to all faculty content. Include the textbook URL in your course materials, and from there, students can choose how they want to view the book.
If you’re a student, simply access the web view, download a PDF, or purchase a hard copy via Amazon or your campus. Even students whose professors have not adopted OpenStax are welcome to use OpenStax textbooks"