Title: Anna Strong and the Revolutionary War Culper Spy Ring (Spy on History Series), Author: Enigma Alberti
Title: Create Your Own Secret Language: Invent Codes, Ciphers, Hidden Messages, and More, Author: David J. Peterson
Title: Double Cross: Deception Techniques in War, Author: Paul B. Janeczko
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Title: George Washington, Spymaster: How the Americans Outspied the British and Won the Revolutionary War, Author: Thomas B. Allen
Title: Mary Bowser and the Civil War Spy Ring (Spy on History Series), Author: Enigma Alberti
Title: Mysterious Messages: A History of Codes and Ciphers: A History of Codes and Ciphers, Author: Gary Blackwood
Title: Nathan Hale, Author: Libertson
Title: Outrunning the Nazis: The Brave Escape of Resistance Fighter Sven Somme, Author: Matt Chandler
Title: Sioux Code Talkers of World War II, Author: Andrea M. Page
Title: Spy Gear, Author: Michael Martin
Title: The Dark Game: True Spy Stories from Invisible Ink to CIA Moles, Author: Paul B. Janeczko
Title: The KGB and Other Russian Spies, Author: Michael E. Goodman
Title: The Mossad and Other Israeli Spies, Author: Michael E. Goodman
Title: Victor Dowd and the World War II Ghost Army (Spy on History Series), Author: Enigma Alberti
Title: War Spies (Profiles Series #7), Author: Daniel Polansky