• Open textbooks are just like traditional textbooks except that the authors have decided to publish them under an open copyright license.
• Open textbooks provide an exciting alternative to traditional books that can save students money and improve the educational experience.
• Open textbooks are available free online and for very low cost in print.
• Recent research has shown that open textbooks are as effective, if not more effective, than traditionally-published course materials.
• Individual faculty members can customize open textbooks to make them better fit their classes.

https://opentextbookalliance.org/open-textbooks/

• Here is what you can do with different Creative Commons license types:

https://open.bccampus.ca/open-textbook-101/demystifying-open-licenses/