Callum Hunt's life has fallen apart.

His friend is gone. The spy has escaped. His secret is out.

He is facing an existence behind bars, banished from the rest of the magical community for what he is - for what he might become.

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?

This fourth year at the Magisterium will be unlike anything else that has gone before . . .

'I can't wait to read more of this series!' - Rick Riordan

Magic can save you
Magic can kill you

It should be a time of celebration. The Enemy of Death is dead; a severed head proof of his downfall. The magical world has no reason to believe otherwise, and Callum, Tamara and Aaron are celebrated as heroes.

But at a party held in their honour, things go horribly, brutally wrong. A fellow student is callously murdered, and it seems Call's worst fears are confirmed: there is a spy in the Magisterium.

No one is safe.

Now, using the powerful magic they've been taught, the trio must risk their lives to track down the killer. But magic is dangerous - in the wrong hands it could bring terrible destruction. And reveal the deadliest secret of all . . .