A little revolution is getting underway. 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. Quick to press, vetted, easy to revise, produced at a low cost by publishers, free for students. What's not to like ... except if you're in the traditional textbook publishing business?
As a quick aside, you can find another free physics textbook (in e-book format) at motionmountain.net.