In a posthuman virtual world sealed off from the ruins of Earth, the idyll is shattered by an arachnid invasion.Designed in imitation of a harbor town in southern Europe, the Realm of Summer is just one of the zones within the virtual resort known as the Costa del Número. It has been more than a thousand years since human guests stopped coming to the Realm, leaving the AIs alone in their endless summer. But now all that has come to a sudden end, as an army of mysterious Spiders begin reducing the town to nothing. As night falls, the few remaining AIs prepare for their final, hopeless battle&; War between the virtual and the real begins in book one of the Angel of the Ruins series.