An edge-of-your seat, narrative nonfiction book for young readers about a group of codebreakers, spies, and navy men that cracked the Nazis' secret cypher and turned the tide of World War II--perfect for fans of The Imitation Game. As the Germans waged a brutal war across Europe, every Nazi plan, every attack, every troop movement was sent over radio. But to the Allied troops listening in-and they were always listening-the crucial messages sounded like gibberish. The communications were encoded with powerful encryption-unless you could unlock the key to the German's Enigma machine.Complete with 60+ historical interior photos, Unbreakable tells the true story of one of the most dangerous war-time codebreaking efforts ever. As Hitler marched his troops across newly conquered lands and deadly "wolfpacks" of German U-Boats prowled the open seas, a team of codebreakers, spies, and navy men raced against the clock to unlock the secrets which hid German messages in plain sight. Victory-or defeat-would hinge on their desperate attempts to crack the code.Told in the riveting multiple points of view of the brave Allied troops and intelligence officers who risked their lives to turn the tide of WWII, as well as the enemies they faced across the battlefield, Unbreakable is a groundbreaking work of narrative nonfiction from the author of Race to the Bottom of the Earth (recipient of four starred reviews)-perfect for fans of Bomb, The Boys Who Challenged Hitler, and The Nazi Hunters.