First published in 1499, the Hypnerotomachia Poliphili has baffled scholars ever since. When a Princeton graduate stumbles upon a means to decoding its hidden meanings, tragedy strikes. He and his friend have stumbled upon a secret worth dying to protect.
Ian Caldwell was Phi Beta Kappa in History at Princeton University. Dustin Thomason won the Hoopes Prize at Harvard University. The two have been best friends since they were eight years old. They began writing The Rule of Four after graduating in 1998.