Signals from Beyond

Have you ever seen a message that was obviously meant to be a secret code? That’s not just for fun. Codes and secret signs have been used throughout history! Readers will love learning examples of codes and ciphers used by ancient and modern armies, organizations with secret rituals, mysterious designs etched into the ground, symbols of ancient royalty, and stone buildings and statues whose purpose are no longer known. A dynamic design with fun illustrations and striking photographs will fu...