Flat World Knowledge is combating the insane price of college textbooks by making open source textbooks an easier solution for colleges. The catalog for now is limited to a few titles per school but eventually they’d like to have more colleges adopt open source online distribution of textbooks. The company sells affordable alternative formats such as print-on-demand full color and black and white print versions, PDF versions, podcast and .mp3 versions, as well as Flat World Knowledge and user-generated study aides such as mobile flash cards and web quizzes to support the books. Naturally social media is in the cards and the company has plans to build student social learning networks around these free books. Instead of purchasing an entire book students can print books to a PDF for only $1.99 per chapter. The company claims it can save 82% on average over purchased college textbooks. Take a quick look at the link below to see if your school has any books available.