The Price is Right: 11 Excellent Sites for Free Digital Textbooks -- Campus Technology

"Sure, there are plenty of options when you want students to try out digital textbooks — CourseSmart, CourseLoad, Flat World Knowledge, Chegg, textbooks.com, Apple, Amazon, Google Play, eFollet, and an ever-growing number of other sources. But little in education trumps free. That's one of the findings in a recently released research report from Educause, Internet2, and McGraw-Hill, which examined the value of digital materials in higher ed. 'Faculty and students were both clear and consistent in their criteria for adopting digital course material,' the report's authors wrote. Little surprise: The most important factor turned out to be cost. With that in mind, we have hunted down the top sources for digital textbooks — all free. What you and your students do with them on Android devices, iPads, and laptops is up to you ..."