Daniel Locke and the Tombs of Hades (The Towers)

Six ancient towers stand guard over the earth, protecting it from every conceivable demise... most of the time. The Tombs of Hades, designed to imprison the worst threats to earths population. What happens when a plague spreads across the planet that even the Tombs can't contain? The fate of the world is in the hands of Daniel Locke. Daniel is an ordinary rich kid, with a magical tattoo that gives him an impenetrable shield. But when he is faced with enemies that are even more powerful then him, Daniel must decide to risk it all or die trying.