Top Secret

Attention: Junior Secret Agent. Now that these top-secret files have fallen into your hands, you have in your possession everything you'll need to know about making and breaking codes and ciphers. From everyday codes and pictographs to encryption and concealment methods used throughout history, this handbook provides the necessary tools for every budding secret agent and cryptographer. And as you'll see, a duo of seasoned, sneaky spies is on the case to illustrate how it all works.