The House of Hades is a fantasy book by Rick Riordan. The book starts directly after Percy, the son of Poseidon, and Annabeth, the daughter of Athena, fall into Tartarus, a primordial deity and the darkest part of the underworld, and follows the progress of the Seven of the Prophecy as they struggle to close the Doors of Death before it’s too late. Along the way Hazel, the daughter of Pluto, takes Hestia, the goddess of magic, as her patron goddess and has to select a fate for the Seven. After selecting to go north, the crew goes to Venice and from there to Diocletian’s palace, the palace of the Roman emperor Diocletian, to find Diocletian's scepter. Once they had Diocletian’s scepter the ship was attacked by Khione, the goddess of snow and
