I

Perseus Jackson, the Son of Poseidon, isn't the child of prophecy. In fact, he's already twenty years old when Annabeth, Thalia, and Luke arrive at Camp Half-Blood. He's the resident sword instructor, and it's clear to everyone that Perseus knows his way around a blade. There's no one in camp who can give him a challenge, and they are even surprised when gods occasionally come down to spar with this demigod. This is his story.