Clockwork Prince
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.
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Cassandra Clare
Cassandra Clare is the name behind some of the most beloved and thrilling fantasy novels of the 21st century. Her Shadowhunter Chronicles—a series set in a shadowy, magical world where demons, angels, and other creatures lurk just beneath the surface of our own—has captured the hearts of readers worldwide. Known for her immersive world-building, complex characters, and heart-pounding action, Clare's books are a portal to a universe where danger and romance intertwine, and where the stakes are always life or death.
The Infernal Devices
There are three books in the Infernal Devices series: Clockwork Angel, Clockwork Prince, and Clockwork Princess. The Infernal Devices are often called a prequel series to the Mortal Instruments, but only because they take place in an earlier time period and contain some of the Mortal Instruments’ characters’ ancestors. You don’t have to read the Mortal Instruments before The Infernal Devices. You don’t have to read the The Infernal Devices before The Mortal Instruments. You can read them in any order.
The Infernal Devices consists of three books. The current recommended reading order for the series is provided below.
Main series Shadowhunters

