୨⎯ Third book of the 'Cast-Down' series ⎯୧ All year the half-bloods have been preparing for battle against the Titans, knowing the odds of victory are grim. With the Olympians fighting Typhon in the west, Percy, his girlfriend, and an army of young half-bloods are the only thing standing between Kronos and Olympus. Will The Great Prophecy and The Half-God Prophecy lean in their favour? Or will it lead to their destruction?