Published on

Clockwork Princess


Clockwork Princess: The Infernal Devices Summary


"Clockwork Princess" is the final installment in Cassandra Clare's Infernal Devices trilogy. This Shadowhunters novel wraps up the adventures and the emotional journeys of its characters with a blend of danger, betrayal, and enchantment. The story is set against the backdrop of Victorian London, where the Shadowhunters face a grave threat from Mortmain, who plans to use his Infernal Devices, an army of pitiless automatons, to destroy them. The only thing missing for his plan to succeed is Tessa Gray.

Key Characters

  • Tessa Gray: At the heart of Mortmain's plans, Tessa finds herself abducted and realizes she must rely on herself for salvation.
  • Will and Jem: The two boys who lay equal claim to Tessa's heart, embark on a desperate quest to save her.
  • Charlotte Branwell: The head of the London Institute, leading the charge against Mortmain's forces.

Plot Highlights

  1. Mortmain's Plan: Aiming to destroy the Shadowhunters with his army of automatons, with Tessa Gray being crucial to his victory.
  2. Rescue Mission: The abduction of Tessa prompts a daring rescue by Will, Jem, and their allies, showcasing the deep bonds and love they share.
  3. Tessa's Realization: Facing Mortmain's clutches, Tessa understands that her true power lies within herself, possibly hinting at her unique heritage and abilities.
  4. A Battle of Love and Loss: The narrative weaves through the personal battles of its characters, focusing on themes of love, sacrifice, and the resilience of the human (and Shadowhunter) spirit.


  • Love and Sacrifice: The novel explores the depths of love and the sacrifices it entails, especially in the context of friendship, romantic love, and the broader fight against evil.
  • Self-Discovery: Tessa's journey is one of self-realization, understanding her power, and her place in the world amid chaos.
  • The Cost of War: The Shadowhunters' fight against Mortmain reflects on the broader costs of conflict, both personal and collective.


In "Clockwork Princess," Cassandra Clare delivers a breathtaking conclusion to the Infernal Devices trilogy, intertwining love, loss, and the fight against darkness. The novel not only concludes the story arc but also leaves readers reflecting on the characters' journeys and the themes that resonate through the Shadowhunters' universe.