OpenStax

OpenStax - 免费开放，同行评审的教科书

OpenStax is a nonprofit organization committed to improving student access to quality learning materials. Our free textbooks are developed and peer-reviewed by educators to ensure they are readable and accurate. OpenStax is an initiative of Rice University and is made possible through the generous support of several philanthropic foundations.

With our app you can:

- View the contents of each released book

- Search the contents of a book

- Save books, chapters or sections to your Bookmarks

- Take notes while reading

- Export your notes to a text file or email them

- Share books or sections of a book with others

- Download a PDF of the book to your device

All of this is presented for free without ads.