Open Source Textbook
Example
"The state of Virginia has published a new open source physics textbook under a Creative Commons license. As detailed in this piece from ZDNet, this peer-reviewed textbook was produced in less than six months by a team of authors, which included “active researchers, high school teachers, and college professors, as well as some retirees.” And it was launched on CK-12’s technology platform. Here comes the new world of textbook publishing." (http://www.openculture.com/2009/03/the_new_open_source_textbook.html)