"The Clockwork Angel" is a fantasy novel by Cassandra Clare, set in the Shadowhunter universe. It follows the story of Tessa Gray, a young woman who travels to London in the 1870s to find her brother. Upon arrival, she discovers she has the ability to shapeshift and is drawn into a world of supernatural beings, including warlocks, vampires, and demons. Tessa is taken in by the Shadowhunters, a group dedicated to protecting humanity from dark forces. As she navigates this new world, she uncovers secrets about her family's past and faces challenges that test her courage and loyalty. The novel explores themes of love, identity, and the struggle between good and evil.