Clare, C: Clockwork Prince

True love is shrouded in secrets and lies in the #1 "New York Times"-bestselling second book of the Infernal Devices trilogy. In the magical underworld of Victorian London, Tessa Gray has found safety with the Shadowhunters. But that safety proves fleeting when it becomes clear that the mysterious Magister will stop at nothing to use Tessa's powers for his own dark ends.