Code breakers and spies are the stuff of legend and intrigue, but in reality, they dramatically impacted wars and influenced society, as well as altered the field of information technology. Technology during the 1940s was primitive by today’s standards, but spying and cryptography were cutting edge for the time. Many have heard of the use of Navajo code talkers during World War II, but this text explores the code talkers and beyond to paint a vivid picture of how cryptography and spy technology shaped the conflict.