The mastermind behind the Mortal Instruments phenomenon, Cassandra Clare dazzles young adult audiences with a mesmerizing blend of romance and fantasy. The second installment of her Infernal Devices series, Clockwork Prince finds the London nstitute's Shadowhunters facing a grave threat in the form of Mortmain and his relentless clockwork army. In the hopes of saving the Institute, Tessa and her friends Will and Jem embark on a dangerous quest to unravel the secrets of Mortmain's origin. But along the way, Tessa makes some shocking discoveries about her own past, leading her to question everything she's ever known.