First the ancient Greeks hid messages under their hair. Then Mary Queen of Scots completely lost her head because of a cracked toe. Now computers create codes no human can crack. "Totally Cracking Codes" is the ultimate guide to unlocking the secret language of spies. Aspiring code-breakers can discover how to decipher dot and dashes, fathom flags, suss a simple cipher and much more!
Age - 8+
Grade - 3rd+
Author - Diana Kimpton
Publisher - Scholastic
Format - Paperback
Pages - 126
Dimensions - 13 x 0.8 x 19.8 cm
