The Shadow Factory: The Ultra-Secret NSA from 9/11 to the Eavesdropping on America
Body of Secrets: Anatomy of the Ultra-Secret National Security Agency
A Pretext for War: 9/11, Iraq, and the Abuse of America's Intelligence Agencies
Code Warriors: NSA's Codebreakers and the Secret Intelligence War Against the Soviet Union
Gordon Welchman: Bletchley Park's Architect of Ultra Intelligence
No Place to Hide: Edward Snowden, the NSA, and the U.S. Surveillance State
The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet
The American Black Chamber (Bluejacket Books)