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- George Washington, spymaster, how the Americans outspied the British and won the Revolutionary War, by Thomas B. Allen
- Mr. Lincoln's high-tech war, how the North used the telegraph, railroads, surveillance balloons, ironclads, high-powered weapons, and more to win the Civil War, Thomas B. Allen & Roger MacBride Allen
- Declassified, 50 top-secret documents that changed history, Thomas B. Allen ; foreword by Peter Earnest
- Shark attacks, their causes and avoidance, Thomas B. Allen
- George Washington, spymaster, how America outspied the British and won the Revolutionary War, Thomas B. Allen ; featuring illustrations by Cheryl Harness
- Harriet Tubman, secret agent, how daring slaves and free Blacks spied for the Union during the Civil War, written by Thomas B. Allen ; with illustrations by Carla Bauer