Inferno (Robert Langdon #4)

With a relentless female assassin trailing them through Florence, he and his resourceful doctor, Sienna Brooks, are forced to flee.

Embarking on a harrowing journey, they must unravel a series of codes, which are the work of a brilliant scientist whose obsession with the end of the world is matched only by his passion for one of the most influential masterpieces ever written, Dante Alighieri's The Inferno .
 
Dan Brown has raised the bar yet again, combining classical Italian art, history, and literature with cutting-edge science in this captivating thriller.