Free: the Future of a Radical Price by Chris Anderson
Free by Chris Anderson: FreeChris Anderson, the editor of Wired and the author of The Long Tail, has written this very provocative book about all things free. Free: the Future of a Radical Price explores the idea that in an age ubiquitous digital products, the marketplace tends to drive the price of digital objects towards (and to) free.
While there are lots of models of how this can be done, it tends to boil down to "give stuff away so that people will buy other stuff." Give away music, make money on concerts and merchandise.
In my line of work the "information wants to be free" mantra has both challenged publishers and liberated scholarly content (e.g. the Open Access movement).
BTW Interesting review of Free by Malcolm Gladwell in The New Yorker.