For most people, puzzles are a fun, fascinating diversion. Yet throughout history, they've also played a crucial role in the great game of espionage. Join Ben, Noel and Max as they welcome their returning guest A.J. Jacobs, author and creator of The Puzzler podcast, to learn more about the history of puzzles, codes and spies in part one of this special two-part episode. See omnystudio.com/listener for privacy information.