Free textbooks from LibreTexts
Source: LibreTexts – Free The Textbook
LibreTexts is a source of textbooks for multiple subjects. The content level is geared more to the college level, but since everything licensed Creative Commons with the Attribution-NonCommercial-ShareAlike 3.0 license, you are free to
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material