Clockwork Angel is the first installment in Cassandra Clare's internationally bestselling Infernal Devices trilogy, which serves as a prequel to the Mortal Instruments series set in Victorian London.

When Tessa Gray arrives in England in search of her brother, she is thrown into the dark and perilous world of the Downworld, where supernatural beings like vampires and warlocks roam the gaslit streets. Kidnapped by the enigmatic Pandemonium Club, Tessa discovers that she possesses a rare ability: the power to transform into another person.

Amidst the chaos, the Shadowhunters, a group of warriors committed to banishing demons from the world, offer Tessa sanctuary. While seeking her brother, Tessa is drawn to two best friends, James and Will, whose complex natures captivate and confound her. But as Tessa is implicated in a dangerous conspiracy that could spell the end for the Shadowhunters, she must confront a dilemma: save her brother or help her new friends save the world?

As Tessa grapples with her feelings and her choices, she comes to realize that love may indeed be the most potent and perilous magic of all.