Zeus and the skeleton army
(Book)

Zeus and his fellow gods-in-training face a new challenge in the underworld when they attempt to capture Cerberus—the three-headed guardian and cherished pet of Zeus’ brother Hades—but find themselves up against more than they bargained for when they have to face off against Melinoe, the Greek goddess of ghosts, nightmares and funerary rites, and her skeletal minions.