His first book, The Puzzle Palace (1982), was the first book published about the National Security Agency (NSA). The book was researched through extensive use of the Freedom of Information Act (FOIA). As a super-secret agency, NSA was quite concerned about their unveiling to the world and accordingly, the government reclassified certain documents in an effort to stop publication. He published Body of Secrets (also about the NSA, 2001), and A Pretext for War (2004). Bamford lectures nationally and was a distinguished visiting professor at the University of California, Berkeley. He also spent nearly a decade as the Washington Investigative Producer for ABC's World News Tonight. In 2006, he received the National Magazine Award for Reporting, the top prize in magazine writing. Most recently, he published his new book The Shadow Factory, once again about the NSA, but about its involvement in the 9/11 nvestigations and intelligence failures. The PBS show "The Spy Factory" was based on this book.