Please watch my presentation on how PressBooks can assist you in creating digital eBooks & ePapers for use in your teaching. Creating eBooks & ePapers is quick, easy, and the formatting allows a comment functionality which enables you and your students to collaborate within the content you create.
Below is an example of an eBook I created using PressBooks. Click here to open my eBook online or you may also download my eBook in PDF format.
Here is another brief tutorial on the particular steps to Collaborating with PressBooks.