Incoming Resources
- Russians among us, sleeper cells, ghost stories, and the hunt for Putin's spies, Gordon Corera
- Venona, Soviet espionage and the American response, 1939-1957, Robert Louis Benson, Michael Warner, editors
- Dead doubles, the extraordinary worldwide hunt for one of the Cold War's most notorious spy rings, Trevor Barnes
- The fourth man, the hunt for a KGB spy at the top of the CIA and the rise of Putin's Russia, Robert Baer
- Spies in the KGB, Laura K. Murray