Operation Columba—The Secret Pigeon Service: The Untold Story of World War II Resistance in Europe

The Spy in the Archive: How one man tried to kill the KGB

Secret Pigeon Service: Operation Columba, Resistance and the Struggle to Liberate Europe

Russians Among Us: Sleeper Cells, Ghost Stories, and the Hunt for Putin's Spies

Intercept: The Secret History of Computers and Spies

Shopping for Bombs: Nuclear Proliferation, Global Insecurity, and the Rise and Fall of the A.Q. Khan Network

Russians Among Us: Sleeper Cells, Ghost Stories and the Hunt for Putin’s Agents