Clockwork Angel, Cassandra Clare - AMAZING this is the first book in the Infernal Devices series and the prequel series to the Mortal Instruments books. This is WAAAAYYY better than TMI books in my opinion.
The Infernal Devices. I literally don't know how I read the majority of the Mortal Instruments books before reading this series. I definitely recommend that every one reads the Infernal Devices before the Mortal Instruments