"A beloved professor of theology and archaeology at Harvard, Cal Donovan has achieved renown - but he drops everything when he is called by his friend Pope Celestine to investigate the potential existence of a mysterious prophecy. And it soon becomes clear that another party is desperate and willing to kill for the same information. When the attacks begin and terror is brought to the very doorstep of the Vatican, Donovan finds himself in a race against time. From Lisbon and Rome, to London and Paris-he will push his limits in order to confront one of the greatest evils the world has ever known"-- Provided by publisher.