No Place to Hide: Edward Snowden, the NSA, and the U.S. Surveillance State is Glenn Greenwald’s account of how he met Edward Snowden and helped report the surveillance revelations that Snowden leaked. The book mixes memoir, investigative reporting, and argument about privacy, government power, and the role of the media.
Body of Secrets by James Bamford is an investigative history of the NSA that argues the agency became one of the most powerful and least understood institutions in the U.S. national-security system. Its core idea is that signals intelligence has shaped major Cold War and post–Cold War events, often with very little public oversight.