The Infernal Devices is a trilogy by author Cassandra Clare, centring on a race called the Shadowhunters introduced in her The Mortal Instruments series. The trilogy is a prequel series to The Mortal

Clockwork Princess is a 2013 fantasy novel written by young adult author Cassandra Clare. It is the third and final installment of The Infernal Devices trilogy, following the first book, Clockwork Ang