Once considered a respectable rare-map dealer, E. Forbes Smiley made millions and was highly esteemed for his knowledge; until he was arrested for slipping maps out of books in the Yale University library. Though pieces of the story have been told before, Blanding is the first reporter to gain access to Smiley himself after he'd gone silent. Although Smiley swears he has admitted to all of the maps he stole, libraries claim he stole hundreds more, and offer evidence to prove it. Using interviews, Blanding teases out the tale of deception.