A.J. Jacobs (host of The Puzzler podcast and author of The Puzzler book) swaps tales of secret messages in the world of spycraft. But A.J. is an expert on many things, and another one of those areas is The U.S. Constitution (he's the author of the new-ish books The Year of Living Constitutionally). What are the conspiracy theories behind and about The Constitution? He also wrote The Year of Living Biblically, so there's stuff about that too. Long story short, it's a fascinating, multi-disciplinary adventure of an episode.