The Cartomancer — Franklin Newman

Josh Moriarty, the son of sorceress Kylie Moriarty, is sent to the Thousand Realms to be trained, for Josh could become a powerful sorcerer himself. Shortly after arriving, Josh and his companions are attacked by slave trader Jupiter Snake, who has his eye on this powerful boy. But when Elkaza Island is raised from the depths, Josh and Jupiter are forced to join forces against both the zombies there, and the spirit of a madman who can control the undead, and is bent on getting revenge. If he can't get Kylie, her son will do just fine...