The Infernal Devices: Clockwork Princess

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

When Mortmain abducts Tessa, the boys who lay equal claim to her heart, Jem and Will, will do anything to save her. For though Tessa and Jem are now engaged, Will is as much in love with her as ever.

Danger and betrayal, secrets and enchantment, and the tangled threads of love and loss intertwine as the Shadowhunters are pushed to the very brink of destruction in this breathtaking conclusion to the Infernal Devices trilogy.

Cassandra Clare vaulted onto the publishing scene with her first YA novel, City of Bones, and has published three other bestselling novels in The Mortal Instruments series. First published in August of 2010, Clockwork Angel marked the first installment of Cassandra's The Infernal Devicestrilogy and debuted at #1 on the New York Times list. The second book in the series is scheduled to release on December 6, 2011. Both The Mortal Instruments and The Infernal Devices have been optioned for film by Unique Features.