City of Lost Souls (The Mortal Instruments #5)
Only a small band of Clary and Jace’s friends and family believe that Jace can still be saved — and that the fate of the Shadowhunters’ future may hinge on that salvation. They must defy the Clave and strike out on their own. Alec, Magnus, Simon and Isabelle must work together to save Jace: bargaining with the sinister Faerie Queen, contemplating deals with demons, and turning at last to the Iron Sisters, the reclusive and merciless weapons makers for the Shadowhunters, who tell them that no weapon on this earth can sever the bond between Sebastian and Jace. Their only chance of cutting Jace free is to challenge Heaven and Hell — a risk that could claim any, or all, of their lives.
And they must do it without Clary. For Clary has gone into the heart of darkness, to play a dangerous game utterly alone. The price of losing the game is not just her own life, but Jace’s soul. She’s willing to do anything for Jace, but can she even still trust him? Or is he truly lost? What price is too high to pay, even for love?
Darkness threatens to claim the Shadowhunters in the harrowing fifth book of the Mortal Instruments series