Here's another stunning New York Times bestseller from world-renowned classic urban fantasy author Cassandra Clare! In her highly anticipated new novel, City of Heavenly Fire, Clary and her friends will find themselves face to face with a truly terrifying foe: Clary's own brother. Sebastian Morgenstern turns the Nephilim against their own brothers. Using the Infernal Chalice, he turns Shadowhunters into creatures of darkness, tearing apart families and lovers to join the ranks of his grim army. Love will be sacrificed and many will give their lives in a terrible battle for the fate of this world in the gripping final novel of The Mortal Instruments!