Thalia, Nico, Percy and Annabeth are stunned to find out about a world of witches and wizards. They are even more stunned to find out they must go, undercover, to Hogwarts. Harry, is excited to go back to school for another year. But will having American "exchange students" ruin it, or improve it? Sorry for the bad description, this is set after BOO (Spoilers) and the Deathly Hallows. Plz read and enjoy! ~Gabby :)