Robert Langdon (abridged)

While in Paris on business, Harvard symbologist Robert Langdon receives an urgent late-night phone call: the elderly curator of the Louvre has been murdered inside the museum. Near the body, police have found a baffling cipher. Solving the enigmatic riddle, Langdon is stunned to discover it leads to a trail of clues hidden in the works of Da Vinci - clues visible for all to see and yet ingeniously disguised by the painter.

Harvard symbologist Robert Langdon is summoned to deliver an evening lecture in the U.S. Capitol. Within minutes of his arrival, the night takes a bizarre turn. A disturbing object is discovered in the Capitol Building. The object is an ancient invitation, meant to usher its recipient into a long-lost world of hidden esoteric wisdom. And when Langdon's mentor is kidnapped, Langdon's only hope of saving him is to accept this invitation and follow wherever it leads him.