The Infernal Devices #1
9781406356885

Clockwork Angel by Cassandra Clare

When sixteen-year-old Tessa Gray arrives in England during the reign of Queen Victoria, something terrifying is waiting for her in London's Downworld, where vampires, warlocks and other supernatural folk stalk the gaslit streets. Friendless and hunted, Tessa weeks refuge with the Shadowhunters, a band of warriors dedicated to ridding the world of demons. Drawn even deeper into their world, she finds herself fascinated by - and torn between - two best friends and quickly realizes that love may be the most dangerous magic of all.

The Infernal Devices #2 
9781442434189

Clockwork Prince by Cassandra Clare

In the magical underworld of Victorian London, Tessa Gray has at last found safety with the Shadowhunters. But that safety proves fleeting when rogue forces in the Clave plot to see her protector, Charlotte, replaced as head of the Institute. 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.
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. He blames them for a long-ago tragedy that shattered his life. 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. 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.
Tessa finds her heart drawn more and more to Jem, but her longing for Will, despite his dark moods, continues to unsettle her. But something is changing in Will—the wall he has built around himself is crumbling. Could finding the Magister free Will from his secrets and give Tessa the answers about who she is and what she was born to do?
As their dangerous search for the Magister and the truth leads the friends into peril, Tessa learns that when love and lies are mixed, they can corrupt even the purest heart.

The Infernal Devices #3
9781442485

Clockwork Princess by Cassandra Clare

The Infernal Devices will never stop coming.

Tessa Gray should be happy - aren't all brides happy? Yet as she prepares for her wedding, a net shadows begins to tighten around the London Institute. A new demon appears, one linked to Mortmain, the man who plans to use his army of pitiless automatons, the Infernal Devices, to destroy the Shadowhunters. And he needs only one last item to complete his plan: Tessa.

The Shadowhunters are desperate to find Mortmain before he strikes. And Jem and Will, the boys who lay equal claim to Tessa's heart, will do anything to save her. For though Tessa and Jem are now engaged, Will is as much in love with her as ever. But their small group cannot stand alone, and the powerful Consul doubts Mortmain's advance. The Shadowhunters find themselves trapped when Mortmain seizes the medicine that keeps Jem alive; now it is up to Will to risk everything to save the girl he and Jem both love. But Tessa is discovering her own powerful true nature. Can a lone girl, even one who can command the power of angels, face down an entire army?

The Shadowhunters are pushed to the very brink of destruction in the breathtaking conclusion to the Infernal Devices trilogy.