Cassandra Clare is the internationally best-selling author of the young adult Shadowhunter Chronicles, which consist of six series: The Mortal Instruments, The Infernal Devices, The Lost Hour, The Dark Artifices, The Wicked Powers, and The Bane Chronicles. She is also the author of the middle-grade series The Magisterium. The Shadowhunter Chronicles have been adapted for film and television, and Clare continues to produce stories set in the world of the Shadowhunters across periods and locations, inspired by Clare’s travels. Clare’s work is known for its intricate plotting, family dynamics, vivid settings, and a blend of romance and fantasy.

Clockwork Angel is the first book in The Infernal Devices series, a prequel trilogy to The Mortal Instruments series. Clockwork Angel was published following Book 3 of The Mortal Instruments, City of Glass, and the subsequent books, Clockwork Prince and Clockwork Princess, were published in between Books 4, 5, and 6 of The Mortal Instruments series. Since the conclusion of The Infernal Devices and The Mortal Instruments, Clare has published an additional prequel series—The Last Hours— and a post-Mortal Instruments series—The Dark Artifices—as well as several novellas and short stories. 

The Infernal Devices series is set in late 1870s Victorian London and follows the Shadowhunters at the London Institute in the early days of the Accords, the tentative peace between supernatural groups.