Secret Messages: Concealment Codes And Other Types Of Ingenious Communication

From the fall of Troy to interstellar messages by way of the Underground Railroad and Captain Midnight, Secret Messages is a collection of ninety-five of the most interesting examples of code and concealed communications throughout history.
Authors William S. Butler and L. Douglas Keeney have compiled a fascinating array of encrypted communications from a varied field. Many of these examples are from times of war, including the story of how a too simple code was the undoing of Benedict Arn...