Traces the life of Elizebeth Smith, who met and married groundbreaking cryptologist William Friedman and worked with him to discover and expose Nazi spy rings in South America by cracking multiple versions of the Enigma machine. "In 1916, a young Quaker schoolteacher and poetry scholar named Elizebeth Smith was hired by an eccentric tycoon to find the secret messages he believed were embedded in Shakespeare's plays. She moved to the tycoon's lavish...

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...

"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...

Examines the ways in which mathematics has been used in warfare, from navigation, mapping, and ballistics to the use and breaking of codes and cyphers, especially the World War II Engima system, logistics, and record-keeping.

"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 radio. But to the Allies listening in, the messages sounded like gibberish. The communications were encoded with a powerful cypher-unless you could unlock...

2 Books in 1 Cryptocurrency Trading Guide DON'T MISS the Golden Opportunity of our Era-Discover How to Make Money with Cryptocurrencies Today! The cryptocurrency revolution is happening right in front of our eyes. More and more people are getting involved to take advantage of the incredible opportunities that cryptocurrencies present. However, given the recently increased demand for cryptocurrencies, it can be difficult to know where to start-which...

A year of HBR's essential thinking on tech-all in one place. From the latest applications of AI to block chain-enabled business models to 5G networks, the most important technological innovations of the past year are reshaping the present and future of business. What should you and your company be doing now to take advantage of the new opportunities they are creating? The Year in Tech, 2021: The Insights You Need from Harvard Business Review will...

Zoe's sixth-grade year at a Brooklyn school for gifted students is marked by changing relationships with her fellow students and teachers, recognition of her talent for cryptography, and a greater awareness of her passion.

Kit Sutherland moves to Washington, DC, to work as a codebreaker at Arlington Hall, but when she stumbles onto a bloody homicide scene, she joins forces with other female codebreakers to find the person killing government girls.