Sneak behind enemy lines with these spy books—for kids ages 8 to 12 The American Revolution, the Civil War, and World War II weren't won solely by soldiers on the battlefield. Spies—the brave men and women who secretly gathered information and misled enemies—were just as important. Uncover the hidden heroes and villains of these wars in this set of exciting history books for kids. Spies in the American Revolution for Kids—Learn all about the spies who gathered information about the British and helped the colonists win their freedom. Spies in the Civil War for Kids—Discover how some of the first submarines and camouflaged mines were used for spying during the Civil War. Spies, Code Breakers, and Secret Agents—Travel back in time to World War II and meet a baseball player and a popular entertainer who became secret agents. Bring history to life with these exciting stories about daring spies.