City of Glass

In the third installment of the Mortal Instruments series, Clary travels to the City of Glass, the Shadowhunters' ancestral home, in an effort to save her mother's life—despite the fact that entering the city without permission breaks Shadowhunter Law. There she finds Jace reluctant to have her present and Simon imprisoned under suspicion for being a vampire who can endure sunlight. As she learns more about her family's past, she gains an ally in a mysterious Shadowhunter named Sebastian, while Valentine amasses his power against the Shadowhunters. Facing this threat may require Downworlders and Shadowhunters to set aside longstanding hatred and fight together.