The Infernal Devices Clockwork Princess Author:Cassandra Clare A prequel to Cassandra Clare's Mortal Instruments series, the third installment of The Infernal Devices finds Tessa Gray preparing for her wedding to Jem Carstairs. But this happy occasion is threatened by a new demon and the Magister, who needs Tessa to complete his plan to destroy the Shadowhunters once and for all. With time running out, Tess... more »a realizes she is the only person powerful enough to save both herself and the Shadowhunters - but whether she is ready to face down an army of Infernal Devices alone is another question...« less