Throughout American history, spies have sneaked behind enemy lines, adopted fake identities, and unearthed enemy secrets. They have sent coded messages, worn clever disguises and used inventive hideaways. The information they've gathered has helped win battles and changed the course of war.

This book features ten stories, from the American Revolution to the Korean War, about the thrilling and dangerous adventures of real-life teenagers who left their mark in the shadowy world of espionage. These young spies chose to live a lie and risk everything—including his or her life—for the good of their country.