It's one of the biggest news stories for years. A charismatic, white-haired Australian sets up a website devoted to publishing leaked documents in the public interest, and then, allegedly with the aid of a disaffected American soldier, starts releasing startlingly honest cables from the US diplomatic service - with explosive results. In this lively, up-to-the-minute book, technology and politics analyst Micah Sifry tells the story of WikiLeaks in the context of the growing movement for transparency in politics and of the crowdsourcing activism that the Internet and in particular Web 2.0 has made possible. In particular, he looks at the achievements of open-source web projects that collate information for individuals and governments alike, and describes how crowdsourcing initiatives have analysed MPs' expenses, recorded political violence in Kenya and reduced bribery in India. Finally, he discusses the rather ambivalent attitudes displayed by political elites, many of whom have embraced the idea of open government in opposition only to go quiet once in power. Fascinating, thoughtful and often eye-opening, this is an essential guide to the new age of transparency.