Incoming Resources
- Modern spies, by Sean Stewart Price
- The secret war, by Francis Russell and the editors of Time-Life Books
- Spies of the American Revolution, an interactive espionage adventure, by Elizabeth Raum ; consultant, Richard Bell, PhD, Associate Professor of History, University of Maryland, College Park
- Spies of the Civil War, an interactive history adventure, by Michael Burgan
- The envoy, Edward Wilson
- All the frequent troubles of our days, the true story of the American woman at the heart of the German resistance to Hitler, Rebecca Donner
- Great true spy stories,, edited by Allen Dulles
- World War II spies and secret agents, by Stuart A. Kallen
- Mother daughter traitor spy, a novel, Susan Elia MacNeal
- Top secret, spies, codes, capers, gadgets, and classified cases revealed, Crispin Boyer & Suzanne Zimbler
- World War II spies, by Sean Stewart Price
- Dawn of the code war, America's battle against Russia, China, and the rising global cyber threat, John P. Carlin with Garrett M. Graff