A Percy Jackson and Harry Potter Crossover Fanfic The war with Gaea is over, and the only plans Percy have are to spend time with Annabeth. But when a crazy old man comes knocking on his door, his whole life is turned upside down. With another evil grandfather out to get him, he has to go to Hogwarts, a place where Magic is more than just a thing for children of Hecate. A Percy is the grandson of Voldemort story. Set in the Order of the Phoenix and after the Blood of Olympus