Decode 68 secret messages—backward ciphers, false word divisions, null ciphers and much more with this fascinating, fun-filled book. Solutions.

Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

Simply and clearly written book, filled with cartoons and easy-to-follow instructions, tells youngsters 8 and up how to break 6 different types of coded message

This vintage book contains Alexander D’Agapeyeff’s famous 1939 work, Codes and Ciphers - A History of Cryptography. Cryptography is the employment of codes

Presents history, trivia, and code-breaking tales in a guide book to the world of secret writing that includes examples of a variety of codes and ciphers.