The prequel trilogy to the internationally bestselling Mortal Instruments Series, The Infernal Devices is set in Victorian London where Shadowhunters are barely winning against the forces of evil. American Tessa Gray is thrown into the midst of a war between the Shadowhunters and the evil Magister, who will stop at nothing to claim Tessa's hidden powers - the ability to transform into another person.

Latest book from The Infernal Devices

Clockwork Prince

Book #2

True love is shrouded in secrets and lies in the enchanting second “steamy, steampunk drama” (Los Angeles Times) in the #1 New York Times bestselling Infernal Devices trilogy, prequel to the internationally bestselling Mortal Instruments series—now with a gorgeous new cover, a map, a new foreword, and excusive bonus content! Clockwork Prince is a Shadowhunters novel.

In the magical underworld of Victorian London, Tessa Gray has found safety with the Shadowhunters. But that safety proves fleeting when it becomes clear that the mysterious Magister will stop at nothing to use Tessa’s powers for his own dark ends.

With the help of the handsome, tortured Will and the devoted Jem, Tessa discovers that the Magister’s war on the Shadowhunters is deeply personal and fueled by revenge. To unravel the secrets of the past, the trio journeys from mist-shrouded Yorkshire to a manor house that holds untold horrors. When they encounter a...

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About the Author

Cassandra Clare
Photo by Kelly Campbell copyright © Simon & Schuster, inc.

Cassandra Clare

Cassandra Clare is the author of the #1 New York Times, USA TODAY, Wall Street Journal, and Publishers Weekly bestselling Mortal Instruments series and the Infernal Devices trilogy, and coauthor of the Bane Chronicles with Sarah Rees Brennan and Maureen Johnson. She also wrote The Shadowhunter's Codex with her husband, Joshua Lewis. Her books have more than 36 million copies in print worldwide and have been translated into more than thirty-five languages. Cassandra lives in western Massachusetts. Visit her at Learn more about the world of the Shadowhunters at



Cassandra Clare and Ed Westwick talk about the Clockwork ...

Cassandra Clare interviews Ed Westwick from the recording studio about the Clockwork Prince Audiobook!