Contents Codes all around us -- Breaking down cryptography -- Codes throughout history -- Code play.
Summary "Discusses different methods for creating secret codes"--Provided by publisher.
All language is code -- Learning about language -- Spoken codes in history -- Working codes -- Fun with codes.
Summary "Looks at historic and modern spoken codes and secret languages, from simple substitution codes, to the Navajo language based code used against the Japanese in World War Two"--Provided by publisher.
Audience RL: 3-4.