“There have been glimpses inside the NSA before, but until now no one has published a comprehensive and detailed report on the agency . . . Mr. Bamford has emerged with everything except the combination to the director’s safe.” –New York Times Book Review

Today’s National Security Agency is the largest, most costly, and most technologically advanced spy organization the world has ever known. It is also the most intrusive, secretly filtering millions of phone calls and e-mails an hour in the United States and around the world. Half a million people live on its watch list, and the number grows by the thousands every month. Has America become a surveillance state?

In The Shadow Factory, James Bamford, the foremost expert on the National Security Agency, charts its transformation since 9/11, as the legendary code breakers turned their ears away from outside enemies, such as the Soviet Union, and inward to enemies whose communications increasingly crisscross America.

Fast-paced and riveting, The Shadow Factory is about a world unseen by Americans without the highest security clearances. But it is a world in which even their most intimate whispers may no longer be private.