The rising cost of textbooks—along with the rise of easy-to-use publishing tools online—has helped drive the popularity of open-source materials and professors’ taking a do-it-yourself approach to textbook publishing. Here are three professors who wrote their own textbooks and are distributing them free.
http://chronicle.com/blogs/wiredcampus/professors-put-textbooks-online-to-reduce-costs-for-students/37677
