What do iStockPhoto, Barack Obama's 2008 Presidential campaign, "American Idol" and Wikipedia have in common?
They're all crowdsourced, which means that a vast number of people contribute, either information, opinions or money. This is the wave of the future, and is already changing a number of industries, from journalism to publishing to entertainment. More than that, it's changing society, back from a consumer culture to one where the line between producer and consumer is blurred (think about it, before mass production, a small group pretty much consumed what it produced).
The rewards that drive the crowd are not, primarily, monetary. They are, instead, the ability to create, to share what they've created, to learn, collaborate and to have a good reputation among their peers.
The book has a clear history of crowdsourcing, and why it works, as well as a first take on the 'rules of crowdsourcing' -- how to make a crowdsourcing effort work. Oh, and a great investment tip, too!