The Sons of Hades

Harry Potter learned he was wizard at 8 years old, and that his father was really Hades, Lord of the Underworld. He gets trained at both Hogwarts School of Witchcraft and Wizardry and Camp Half Blood, but just when he's settled in at school, he finds out he has a brother and sister. Bad things happen, but at least his next 6 years at school will go okay, right? AU