Unbreakable: The Spies Who Cracked the Nazis’ Secret Code

This true account follows the codebreakers, spies, and naval personnel who worked to decipher the Nazis’ Enigma machine during World War II. Allied forces intercepted messages that initially seemed meaningless, while people from Poland, France, and Britain contributed to solving the complex military codes. Their efforts to understand encrypted communications form the book’s central story, with back matter adding further context to this wartime intelligence work.