The 4th title of The Mortal Instruments arrives in a special 10th Anniversary edition, with die-cut dust jackets.
Someone is killing the Shadowhunters of Valentine's Circle, and these deaths once again pit Shadowhunters against Downworlders. Only Simon, now a vampire, can prevent the confrontation. Meanwhile, Clary and Jace will uncover a mystery that will either strengthen their relationship or... destroy it forever.
