The Intelligence Wars: Lessons from Baghdad by Steven K.O'Hern.

Spies for Hire: The Secret World of Intelligence Outsourcing by Tim Shorrock.

The Shadow Factory: The Ultra-Secret NSA from 9/11 to the Eavesdropping on America by James Bamford.

Human Intelligence, Counterterrorism, and National Leadership: A Practical Guide by Gary Berntsen.

Executive Measures, Terrorism, and National Security—Have the Rules of the Game Changed? by David Bonner.

The Human Factor: Inside the CIA's Dysfunctional Intelligence Culture by Ishmael Jones.

The Lost Spy: An American in Stalin's Secret Service by Andrew Meier.

Threats to Homeland Security: An All-Hazards Perspective. Edited by Richard J. Kilroy, Jr.