Action-packed and full of mystery, this third fantasy novel in the Gargoyles trilogy is a must-read for fans of magic, mythology and the power of friendship. A swarm of ghasts. A sullied Source. A shocking secret. Sole Guardian. Callen has worked hard for that title, and now he's got it. Oculus have left him in charge, with onlytwo conditions: keep the magic hidden and maintain the boundary that protects Gargoyle's Rest. But life is never straightforward when there's magic involved. When a spate of ghast attacks threatens the local village, Callen will need to use all of his new skills to investigate. Jake is gone, the Watcher is gone, so who could be summoning ghasts? As darkness spreads, friendships fracture, and his suspect list grows, Callen discovers that Oculus may not have told him the whole truth.