Codes, Ciphers, Secrets and Cryptic Communication : Making and Breaking Sercet Messages from Hieroglyphocs to the Internet

Covert communications have won or lost wars, exposed political intrigue, disguised secret religions and societies, and secured financial transactions. This immensely readable world history of clandestine communication-- finally in paperback-- includes illustrations, diagrams, and puzzles that instruct readers how to become amateur cryptographers. It's the last word on secret languages!