Wikinomics is a book about the mass web-based collaboration that has emerged in the last few years. It explains well-known phenomena such as Wikipedia and Flickr, as well as new kinds of business such as InnoCentive , which introduces a peer-to-peer model to scientific research.

The only annoyance is the book's relentless repetition of the key points, as if it were not a fairly simple idea, so although I recommend the book, you should skip half of it.