Unbreakable : the spies who cracked the Nazis' secret code
by Barone, Rebecca E. F. (Author)
Summary
"A nonfiction manuscript for young readers about a group of Allied spies and codebreakers that cracked the Nazis's infamous cypher, allowing them to read secret military messages and turn the tide of World War II. During WWII, as the Germans waged war, every Nazi plan, every attack, was sent over ra... Full description
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