How Elizebeth Friedman Changed the Course of Two World Wars - Age 6+

A Fascinating History of Ciphers and Cryptography - Age 8+

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.

A World War II Book for Kids (Spies in History for Kids) - Age 8+

3-Book series: Age 8+

1) So You Want to Be a Spy?

2) Simple Code Breaking and Ciphering.

3) How Cryptography Becomes Encryption.

A Handbook of Codes, Ciphers and Secret Writing - Age 9+

Young Reader's Edition: Age 8+

In the tradition of Hidden Figures and The Girls of Atomic City, Code Girls is the amazing true story of the young American women who cracked German and Japanese military codes during World War II.

The Untold Story of the American Women Code Breakers of World War II.

Age 14+

The World War II Codebreakers Who Beat the Enigma Machine--And More Than 100 Puzzles and Riddles That Inspired Them.