From the imaginations of bestselling authors Holly Black and Cassandra Clare comes a heart-stopping plunge into the magical unknown. Think you know magic? Think again. The Magisterium awaits. Most people would do anything to get into the Magisterium and pass the Iron Trial. Not Callum Hunt. Call has been told his whole life that he should never trust a magician. And so he tries his best to do his worst - but fails at failing. Now he must enter the Magisterium. It's a place that's both sensational and sinister. And Call realizes it has dark ties to his past and a twisty path to his future. The Iron Trial is just the beginning. Call's biggest test is still to come.