The first book in the Percy Jackson and the Olympians series. Percy is a twelve-year-old kid who discovers he's a demigod--half human, half god-- as the absent father he's never known is actually Poseidon, king of the sea. If you're looking for books boys love, in Riordan's world, the gods stir up all kinds of trouble down on earth.

The gods of Olympus live on in 21st century America. In the series opener, Percy Jackson and the Lightning Thief, Percy is a twelve-year-old kid who discovers he’s a demigod--half human, half God-- as the absent father he’s never known is actually Poseidon, king of the sea. In Riordan’s world, the gods still mix with and marry humans, and continue to stir up all kinds of trouble down on earth. 5 books in the series.