And it will come down to the price points , Frank acknowledges , even when the company develops formats for the Sony e-book reader and Amazon Kindle , as they hope to this year . Flat World Knowledge offers free access to digital textbooks online . The company charges $ 20 for downloadable PDF-format books . Interest in the company is rising ; the service will be at 400 colleges this year . Comment:
Flat World Knowledge offers free access to digital textbooks online . The company charges $ 20 for downloadable PDF-format books . Interest in the company is rising ; the service will be at 400 colleges this year . Comment: