By Cassandra Claire
Tessa Gray should be happy -- aren't all brides happy? Yet as she prepares for her wedding, a net of shadows begin to tighten around the Shadowhunters of the London Institute. A new demon appears, one linked by blood and secrecy to Mortmain, the man who plans to use his army of pitiless automatons, the Infernal Devices, to destroy the Shadowhunters. Mortmain needs only one last item to complete his plan. He needs Tessa.