The Infernal Devices will never stop coming.
Tessa Gray should be happy - aren't all brides happy? Yet as she prepares for her wedding, a net shadows begins to tighten around the London Institute. A new demon appears, one linked to Mortmain, the man who plans to use his army of pitiless automatons, the Infernal Devices, to destroy the Shadowhunters. And he needs only one last item to complete his plan: Tessa.
The Shadowhunters are desperate to find Mortmain before he strikes. And Jem and Will, the boys who lay equal claim to Tessa's heart, will do anything to save her. For though Tessa and Jem are now engaged, Will is as much in love with her as ever. But their small group cannot stand alone, and the powerful Consul doubts Mortmain's advance. The Shadowhunters find themselves trapped when Mortmain seizes the medicine that keeps Jem alive; now it is up to Will to risk everything to save the girl he and Jem both love. But Tessa is discovering her own powerful true nature. Can a lone girl, even one who can command the power of angels, face down an entire army?
The Shadowhunters are pushed to the very brink of destruction in the breathtaking conclusion to the Infernal Devices trilogy.
