Break secret codes and decipher vital messages in this mini book of puzzles. From collecting launch codes to reading spy watches, it's packed with activities th

"Discusses different methods of secret communications used by spies, such as Morse code, the Enigma machine, the Najavo language, and digital steganography, and

How did real-life spies communicate in secret? Readers get a sneak peek at actual spies and the gear they used to exchange information and complete their missio

The world's leading toy manufacturer gives each toy it creates a tiny, computerized brain and a unique personality making for some seriously awesome toys. But s

Decode the story of Elizebeth Friedman, the cryptologist who took down gangsters and Nazi spies In this picture book biography, young readers will learn all abo