How cool is this. Now there is a company that will enable students to get free text books without any annoying ads. Yes, finally an ad-free solution. The company is called Flat World Knowledge and their business model does not depend on advertising. Instead, it offers affordable supplementary materials to students beyond the free online book, including printed, on demand textbooks for around USD 30; audio books for around USD 25; and downloadable and printable files by the chapter. Even better professors will be able to customize their class by removing or even adding their own information to the textbooks they choose to use.
Check out the videos on the home page to get a better ideas of different audiences that will use this solution.