In May 2013 Glenn Greenwald set out for Hong Kong to meet an anonymous source who claimed to have astonishing evidence of pervasive government spying and insisted on communicating only through heavily encrypted channels. That source turned out to be the twenty-nine-year-old NSA contractor Edward Snowden, and his revelations about the agency"s widespread, systemic overreach proved to be some of the most explosive and consequential news in recent history, triggering a fierce debate over national security and information privacy. Now, for the first time, Greenwald fits all the pieces together, recounting his high-intensity ten-day trip to Hong Kong, examining the broader implications of the surveillance detailed in his reporting for the Guardian, and reveahng fresh information on the NSA"s unprecedented abuse of power with never-before-seen documents entrusted to him by Snowden himself. Going beyond the NSA, Greenwald also takes on the establishment media for their failure to...