The fourth installment of the graphic novel adaptation of Cassandra Clare s bestselling The Mortal Instruments! Maia and Simon are kidnapped, and Jace knows exactly who took them. It s time to face the terror known as Valentine to stop him from slaughtering the Downworlders and activating the Soul-Sword. All the Shadowhunters gather to join the fight, but when they find themselves hopelessly outnumbered by thousands of demons, the fate of the world might just lie in Clary s hands...! The showdown begins in this action-packed volume accentuated by beautiful illustrations by artist Cassandra Jean. Plus, get a glimpse into the secret interaction between Valentine and Jace, revealed here for the first time by Cassandra Clare!