The Fifth Gospel

The instant New York Times bestseller from the author of the international sensation The Rule of Four combines a lost gospel, a contentious relic, and a dying pope’s final wish into a “deliciously labyrinthine” (Providence Journal) intellectual thriller that “kicks off at ninety mph and doesn’t slow down” (Associated Press).

A mysterious exhibit is under construction at the Vatican Museums. The curator is murdered at a clandestine meeting on the outskirts of Rome a week before it opens. That...