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.
Danger, betrayal, and enchantment abound in the "exhilarating" (Booklist) conclusion to the #1 New York Times bestselling Infernal Devices trilogy--now with a gorgeous new cover, a new foreword, and exclusive bonus content Clockwork Princess is a Shadowhunters novel.

THE INFERNAL DEVICES WILL NEVER STOP COMING

A net of shadows begins to tighten around the Shadowhunters of the London Institute. Mortmain plans to use his Infernal Devices, an army of pitiless automatons, to destroy the Shadowhunters. He needs only one last item to complete his plan: he needs Tessa Gray.

Charlotte Branwell, head of the London Institute, is desperate to find Mortmain before he strikes. But when Mortmain abducts Tessa, the boys who lay equal claim to her heart, Will and Jem, will do anything to save her. As those who love Tessa rally to rescue her from Mortmain's clutches, Tessa realizes that the only person who can save her is herself. But can a single girl, even one who can command the power of angels, face down an entire army?

The tangled threads of love and loss intertwine as the Shadowhunters are pushed to the very brink of destruction in the breathtaking conclusion to the Infernal Devices trilogy.