Clockwork Princess

Clockwork Princess

For Ages: 14 - 99
  • 1
Danger and betrayal, love and loss, secrets and enchantment are woven together in the breathtaking finale to the #1 New York Times bestselling Infernal Devices Trilogy, prequel to the internationally bestselling Mortal Instruments series.


A net of shadows begins to tighten around the Shadowhunters of the London Institute. Mortmain plans to use his Infernal Devices, an army of pitiless automatons, to destroy the Shadowhunters. He needs only one last item to complete his plan: he needs Tessa Gray.

Charlotte Branwell, head of the London Institute, is desperate to find Mortmain before he strikes. But when Mortmain abducts Tessa, the boys who lay equal claim to her heart, Jem and Will, will do anything to save her. For though Tessa and Jem are now engaged, Will is as much in love with her as ever.

As those who love Tessa rally to rescue her from Mortmain’s clutches, Tessa realizes that the only person who can save her is herself. But can a single girl, even one who can command the power of angels, face down an entire army?

Danger and betrayal, secrets and enchantment, and the tangled threads of love and loss intertwine as the Shadowhunters are pushed to the very brink of destruction in the breathtaking conclusion to the Infernal Devices trilogy.
  • Margaret K. McElderry Books | 
  • 592 pages | 
  • ISBN 9781416975908 | 
  • March 2013 | 
  • Grades 9 and up | 
  • Lexile ® 840L
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Reading Group Guide

A Reading Group Guide to

Clockwork Princess
By Cassandra Clare

About this Book

Great things are afoot at the London Institute. Tessa and Jem are preparing for their wedding. Charlotte and Henry are expecting a baby. Cecily Herondale and Gideon Lightwood have joined the Institute’s ranks. Jessamine is coming home. And no longer believing himself to be cursed, Will can finally open his heart to love. But despite the causes for celebration, everyone is weighed down by a sense of pervasive gloom. Mortmain is still out there somewhere, biding his time before he strikes again, Consul Wayland is undermining Charlotte’s leadership, and Tessa knows that her happiness with Jem comes with a price—Will’s heart. When Mortmain’s clockwork automatons attack the Institute, leaving behind injury and confusion and death, the Shadowhunters must fight for everything they’ve ever believed in or held dear. Tessa and her friends must find Mortmain and stop him, or risk losing Jem, the Institute, their lives . . . and even the world as they know it.

Discussion Questions

1. Cassandra Clare begins the book with a stanza from Alfred, Lord Tennyson’s poem “In Memoriam A.H.H.” What is this poem about? In what ways does the overarching message of this poem fit with the events and themes of Clockwork Princess?

2. When Jem and W see more

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Every Exquisite Thing
City of Bones
Cast Long Shadows

About the Author

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

Cassandra Clare

Cassandra Clare is the #1 New York Times and USA TODAY bestselling author of Lord of Shadows and Lady Midnight, as well as the internationally bestselling Mortal Instruments series and Infernal Devices trilogy. She is the coauthor of The Bane Chronicles with Sarah Rees Brennan and Maureen Johnson and Tales from the Shadowhunter Academy with Sarah Rees Brennan, Maureen Johnson, and Robin Wasserman, as well as The Shadowhunter’s Codex, which she cowrote with her husband, Joshua Lewis. Her books have more than 50 million copies in print worldwide and have been translated into more than thirty-five languages, a feature film, and a TV show, Shadowhunters, currently airing on Freeform. Cassandra lives in western Massachusetts. Visit her at Learn more about the world of the Shadowhunters at


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