When they encounter a clockwork demon bearing a warning for Will, they realize that the Magister himself knows their every move-and that one of their own has betrayed them. To unravel the secrets of the past, the trio journeys from mist-shrouded Yorkshire to a manor house that holds untold horrors, from the slums of London to an enchanted ballroom where Tessa discovers that the truth of her parentage is more sinister than she had imagined. He blames them for a long-ago tragedy that shattered his life. With the help of the handsome, self-destructive Will and the fiercely devoted Jem, Tessa discovers that the Magister’s war on the Shadowhunters is deeply personal.

If Charlotte loses her position, Tessa will be out on the street-and easy prey for the mysterious Magister, who wants to use Tessa’s powers for his own dark ends. But that safety proves fleeting when rogue forces in the Clave plot to see her protector, Charlotte, replaced as head of the Institute. In the magical underworld of Victorian London, Tessa Gray has at last found safety with the Shadowhunters. Equipped with a magical army of unstoppable clockwork creatures, the Club is out to rule the British Empire, and only Tessa and her allies can stop them. Soon they find themselves up against the Pandemonium Club, a secret organization of vampires, demons, warlocks, and humans. She soon discovers that her only allies are the demon-slaying Shadowhunters-including Will and Jem, the mysterious boys she is attracted to.

Tessa Gray descends into London’s dark supernatural underworld in search of her missing brother.

Welcome to the Infernal Devices trilogy, a stunning and dangerous prequel to the New York Times bestselling Mortal Instruments series. In a time when Shadowhunters are barely winning the fight against the forces of darkness, one battle will change the course of history forever.

The infernal devices trilogy