After a series of inexplicable events, Percy Jackson learns he is actually the son of his mortal mother and the Greek god Poseidon. He then goes to stay at Camp Half-blood both as training for his newly found powers and as protection from forces that are obviously trying to destroy him. This series cleverly integrates Greek mythology with modern situations and is both entertaining and educational. Riordon creates characters to be enjoyed by teens and slips a little ancient culture in on the side.