Is Clockwork Princess the last book in The Infernal Devices trilogy?

Yes. Clockwork Princess, published in March 2013 by Margaret K. McElderry Books, is the third and final novel in Cassandra Clare's The Infernal Devices trilogy, following Clockwork Angel and Clockwork Prince.

Is The Infernal Devices connected to The Mortal Instruments?

Yes. The Infernal Devices is a prequel trilogy set in the same Shadowhunter world as The Mortal Instruments, taking place in Victorian-era London decades before Clary Fray's story.

Clockwork Princess

The Infernal Devices Book 3

Fantasy Young Adult

Pages: 576
Published: 2013
Language: English

As Tessa Gray prepares to marry Jem Carstairs, the Shadowhunters make their final stand against Mortmain, the industrialist known as the Magister, who intends to wipe out the Nephilim with his army of clockwork automatons. When Tessa is taken by Mortmain, Will and Jem must confront both the enemy and the truth of their own bond to save her and the London Institute. The conclusion of the trilogy resolves Tessa's feelings for both men and the mystery of her own origins.

Prose complexity: 4/10

Dark Romantic Emotional Tense

Love Triangle Sacrifice

Cassandra Clare

Cassandra Clare is the pen name of Judith Lewis, born Judith Rumelt to American parents in Tehran, Iran. She spent her childhood travelling with her family, living in France, England and Switzerland before she was ten, and attended high school in Los Angeles. She worked in entertainment journalism — including a spell at The Hollywood Reporter — before turning to fiction full time in 2006. City of Bones (2007) opened The Mortal Instruments, the six-book series that established her Shadowhunters w...

Tessa GrayProtagonist

A shape-changing warlock facing the truth about her own nature.

Axel MortmainAntagonist

The Magister, an industrialist bent on destroying the Shadowhunter race with clockwork automatons.

Will HerondaleSupporting

A tormented Shadowhunter whose feelings for Tessa come to a head.

Jem CarstairsSupporting

Will's gravely ill parabatai, engaged to Tessa.

All characters in Clockwork Princess

Frequently asked questions

Is Clockwork Princess the last book in The Infernal Devices trilogy?
Yes. Clockwork Princess, published in March 2013 by Margaret K. McElderry Books, is the third and final novel in Cassandra Clare's The Infernal Devices trilogy, following Clockwork Angel and Clockwork Prince.
Is The Infernal Devices connected to The Mortal Instruments?
Yes. The Infernal Devices is a prequel trilogy set in the same Shadowhunter world as The Mortal Instruments, taking place in Victorian-era London decades before Clary Fray's story.