The Wealth of Networks

I highly recommend a commonly ignored part of economics and that is the economics of goods with zero marginal cost of production. The two key texts in this area are: Yochai Benkler's "The Wealth of Networks" -- This text is a bit dated (2005) and the first two chapters couldn't be more dry and boring, but after that the economic discussion in the book about how economics changes when the marginal cost of product reaches zero or near-zero is fascinating. Hal Varian's "Information Rules" -- This book covers the same ground at Yochai's book, but is less academic in tone. FYI, Varian is Google's chief economist.