Code-cracking skills can be put to the test in this entertaining book which teaches children how to write and decode secret messages. Includes Semaphore and Mor

The Secret Code Book is a short introduction to substitution ciphers. The chapters ease young readers into the concept of rotation ciphers and work their way up

Presents a variety of codes and ciphers and includes messages to encode and decode

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

"Discusses different methods for speaking secret codes"--Provided by publisher.