City of Glass (The Mortal Instruments, Book 3)

With two of the Mortal Instruments now in Valentine's hands, the world of the Shadowhunters teeters on the brink of civil war. Jace and the Lightwoods are recalled to Idris, the Shadowhunters' remote and hidden home country, where a search has begun for the last of the Instruments, the Mortal Glass.