"Clockwork Prince" is the second book in the Infernal Devices series by Cassandra Clare. Set in Victorian London, it follows the story of Tessa Gray, a young woman with the ability to shapeshift, as she navigates the world of Shadowhunters and their battles against dark forces. In this installment, Tessa, along with her friends Will Herondale and Jem Carstairs, faces new challenges as they seek to uncover the truth about the mysterious Clockwork Army. The novel explores themes of love, friendship, and sacrifice while delving deeper into the characters' backgrounds and relationships.