Clockwork Princess by Cassandra Clare
Book #3 - The Infernal Devices
March 19th 2013 by Margaret K. McElderry Books
In Clockwork Princess, Tessa and her companions travel all over the world as they race to stop the clockwork army before it’s too late. As Jem’s health worsens alarmingly and his friends search desperately for a cure, can Tessa choose between the two boys she loves—even if it means never seeing the other one again?