Clockwork Princess by Cassandra Clare
Danger and betrayal in the breathtaking conclusion to the Infernal Devices trilogy
As Tessa Gray prepares for the wedding, a net of shadows begins to tighten around the Shadowhunter of the London Institute. Mortmain needs one last item to complete his plan. He needs Tessa, Jem and Will, the boys who lay equal claim to Tessa’s heart, will do anything to save her.