Title: One Dead Spy (Nathan Hale's Hazardous Tales Series #1)), Author: Nathan Hale
Title: World War II Spies: An Interactive History Adventure, Author: Michael Burgan
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Title: The Secret Agent and Other Spy Kids (Ten True Tales Series), Author: Allan Zullo
Title: The Plot to Kill Hitler: Dietrich Bonhoeffer: Pastor, Spy, Unlikely Hero, Author: Patricia  McCormick
Title: George Washington's Spies (Totally True Adventures), Author: Claudia Friddell
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Title: Courage & Defiance: Stories of Spies, Saboteurs, and Survivors in World War II Denmark, Author: Deborah Hopkinson
Title: The Plot to Kill Hitler: Dietrich Bonhoeffer: Pastor, Spy, Unlikely Hero, Author: Patricia  McCormick
Title: Secret Agents! Sharks! Ghost Armies!: World War II, Author: Laurie Calkhoven
Title: The Founding Fathers Were Spies!: Revolutionary War, Author: Patricia Lakin
Title: Heroes Who Risked Everything for Freedom: Civil War, Author: Patricia Lakin
Title: Fearless Flyers, Dazzle Painters, and Code Talkers!: World War I, Author: Elizabeth Dennis
Title: The Complete Guide to World War II, Author: Richard Panchyk
Title: The Secret Agent Training Manual: How to Make and Break Top Secret Messages: A Companion to the Secret Agents Jack and Max Stalwart Series, Author: Elizabeth Singer Hunt
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Title: The Secret Agent Training Manual: How to Make and Break Top Secret Messages: A Companion to the Secret Agents Jack and Max Stalwart Series, Author: Elizabeth Singer Hunt
Title: The Big Book of Spy Stuff, Author: Bart King
Title: Spies of the Civil War: An Interactive Espionage Adventure, Author: Michael Burgan
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Title: Spies! (DK Readers Level 3 Series), Author: Richard Platt
Title: Nathan Hale's Hazardous Tales: One Dead Spy, Author: Nathan Hale
Title: Spies of the American Revolution: An Interactive Espionage Adventure, Author: Elizabeth Raum
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Title: Lincoln's Flying Spies: Thaddeus Lowe and the Civil War Balloon Corps, Author: Gail G. Jarrow