"A nonfiction chronicle of the courageous efforts of remarkable young women recruited by the US government to crack German and Japanese military codes during World War II."--Provided by publisher.

"1943. As war in the Pacific rages on, Isabel Cooper and her codebreaker colleagues huddle in "the dungeon" at Station HYPO in Pearl Harbor, deciphering secrets plucked from the airwaves in a race to bring down the enemy. Isabel has only one wish: to avenge her brother's death. But she soon finds life has other plans when she meets his best friend, a hotshot pilot with secrets of his own. 1965. Fledgling journalist Lu Freitas comes home to Hawai'i...

An exploration of how codes-both cipher and aesthetic-have come to exist in history from Pythagoras through the Knights Templar to Turing and more. Did the Masons encode messages in walls-and even in the street plan of Washington, D.C.? Does the Hebrew Bible conceal hidden mysteries? Ingenious methods for encoding secrets have taken many amazing turns through the ages, from the military signals the Romans flashed from hilltop to hilltop, to the computer...

In 1940, almost a year after the outbreak of the Second World War, Allied radio operators at an interception station in South London began picking up messages in a strange new code. Traffic in this new encryption increased dramatically and Bletchley Park codebreakers worked furiously to decipher the code that held the key to the secrets of Nazi high command. The codebreakers used science, maths, innovation and improvisation to invent an entirely new...

An examination of one of the most important yet underexplored aspects of World War II--intelligence--shows how espionage successes and failures by the United States, Britain, Russia, Germany, and Japan influenced the course of the war and its final outcome.

"Communicate safely! Join the greatest Encryptor team in the world! Your mission: transmit secret codes to your teammates without letting the opposing team intercept. Decrypto is a "scramble communication" game: you must give clues to your teammates that are precise enough, so they can understand you, but vague enough, to make sure your opponents don't get the message...٣ -- from publishers website

Learn how to make and break codes, master cipher systems, and experiment with secret writing.

"Codes can carry big secrets! Throughout history, lots of good guys and lots of bad guys have used codes to keep their messages under wraps. This fun and flippable nonfiction features stories of hidden treasures, war-time maneuverings, and contemporary hacking as well as explaining the mechanics behind the codes in accessible and kid friendly forms. Sidebars call out activities that invite the reader to try their own hand at cracking and crafting...

From the ingenious ciphers of Italian princes to the spy books of the Civil War to the advanced techniques of the CIA, codes and code breaking have played important roles throughout history.