City of Heavenly Fire

 

From the Author's website:

"However, while I was writing the first book in The Infernal Devices, Clockwork Angel, which deals with Jace, Clary, and the Lightwoods’ ancestors, the way events played out in it gave me the idea for a new villain and conflict that might beset the cast of characters from The Mortal Instruments, and connect up to the plotline from the planned graphic novel. I’ve always liked stories where the distant past comes forward to affect the future, so, without being spoilery, when I realized I could connect the events of Infernal Devices to the few loose ends left at the end of Glass, I realized I wouldn’t want to pass up writing that story, especially considering how much chaos I knew it would bring to the lives of Jace, Clary, Simon, Alec, Magnus, Isabelle and the rest!"