Callum Hunt's life has fallen apart.<br/><br/>His friend is gone. The spy has escaped. His secret is out.<br/><br/>He is facing an existence behind bars, banished from the rest of the magical community for what he is - for what he might become.<br/><br/>But a shocking revelation has promised freedom - at a cost. Will he stay strong, and faithful to his friends and teachers? Or take the risk, and destroy everything he's ever loved?<br/><br/>This fourth year at the Magisterium will be unlike anything else that has gone before . . .<br/><br/>'I can't wait to read more of this series!' - Rick Riordan