: Drawing inspiration from Dante’s Divine Comedy , Langdon races through Florence and Venice to stop a global plague.

: This global phenomenon explores alternative theories about the Holy Grail and the bloodline of Jesus Christ, centering on clues hidden in Leonardo da Vinci’s paintings.

The heart of Dan Brown’s bibliography is the Robert Langdon series , featuring the Harvard professor of religious symbology. These novels typically take place over a frantic , leading Langdon through a "treasure hunt" of codes, ancient symbols, and secret societies.