The Copper Gauntlet: Book Two of Magisterium by Cassandra Clare

From the remarkable imaginations of bestselling authors Holly Black and Cassandra Clare comes a heart-stopping, mind-blowing, pulse-pounding plunge into the magical unknown.All his life, Call has been warned by his father to stay away from magic. Now that he's entered the Magisterium, Call's sure the school can only bring bad things. A place both sensational and sinister, the Magisterium has dark ties to his past -- and a twisty path to his future. A path that will forever change everything Call thought he knew about the worlds of good and evil.