Presents a guide to codemaking, codebreaking, and their role in history, describing different types of codes and ciphers, discussing codebreaking and concealment techniques, and including brief stories about exciting moments in the history of the art.

"Discusses the heroic actions and experiences of the Navajo code talkers and the impact they made during times of war and conflict"--

Provides information about the historical code makers and breakers who protected their countries by coding and decoding messages for their governments, and the modern cryptologists who keep emails, texts, and online purchases secure.

An introduction to the Navajo explaining why and how their language was well-suited to being used for coded messages.

Describes the role of a select group of Navajo Marines who developed a code based on their own native language that provided a means for secure communications among American forces in the Pacific during World War II.

An alphabetical exploration of the world of codes and ciphers and significant individuals involved in that field.

"By the time the United States joined the Second World War in 1941, the fight against Nazi and Axis powers had already been under way for two years. In order to win the war and protect its soldiers, the US Marines recruited twenty-nine Navajo men to create a secret code that could be used to send military messages quickly and safely across battlefields. Author James Buckley Jr. explains how these brave and intelligent men developed their amazing code,...

Explains how to create various kinds of codes and discusses other means of sending messages, such as Indian sign language, brands, and flag signals.

"Teaches readers how to make secret codes and messages through clear steps, simple supplies, and helpful tips."--Provided by publisher.

Describes twenty different codes and ciphers, tells how to break them, and gives simple instruction for making encoding tools.