


Gabriel moves to the London Institute and develops a relationship with Will Herondale's sister, Cecily, who has also taken residence in the Institute after failing to convince Will to return home, much to Will's annoyance. At the end, Gabriel and his brother, Gideon, have no choice but to kill their father, creating a rift between the brothers and Tatiana.

Gabriel Lightwood arrives at the Institute and requests help in taking care of his father, Benedict, whose demon pox has turned him into a worm, killing the Lightwood's servants and Rupert Blackthorn, the husband of his daughter, Tatiana. Two months after the events of the previous book, Tessa Gray is in the midst of preparing for her wedding to Jem Carstairs. This final installment follows Tessa and her friends as they face off against the series main antagonist, The Magister (also known as Axel Mortmain), who plans to completely obliterate the Shadowhunter race. It is written in the third person through the perspective of the main protagonist, Tessa Gray, who resides in the Shadowhunter's London Institute. It is the third and final installment of The Infernal Devices trilogy, following the first book, Clockwork Angel, and the second book, Clockwork Prince. Clockwork Princess is a 2013 fantasy novel written by young adult author, Cassandra Clare.
