Tessa Gray is safe for the time being from the Magister. She is living with the Shadowhunters and they are training her to defend herself. But the evil forces of the Magister are gathering strength. He is creating an army of automatons with the intent to kill all the Shadowhunters and take Tessa as his wife in order to use her special powers. The Magister has even infiltrated the Shadowhunters clave. Tessa, Will, and Jem are trying desperately to figure out how to save the clave and stop the Magister. The task is all the more difficult for Tessa as she struggles against her feelings for the handsome and tempestuous Will. She is also aware that devoted, kind-hearted Jem is falling in love with her. Will they be able to stop the Magister? Will her feelings for Will and Jem destroy their bonds of brotherhood? Clockwork Prince is book two in the "Infernal Devices" series. It is a page-turning read into the magical steampunk underworld of London.