Zeus has declared The Guardians public enemy number one. The Guardians and Mya have a plan. Go to the Underworld, obtain water from the River Mnemosyne, and break the curse that turns werewolves into their most vicious opponents: the vrykolakas. But monsters, demons, and even mermaids stand in their way as they travel through the harrowing realm of the undead. Personal challenges also litter their path to success in this explosive...