After getting expelled from yet another school for yet another clash with mythological monsters only he can see, 12-year-old Percy Jackson is taken to Camp Half-Blood, where he finally learns the truth about his unique abilities: he is a demigod, half human, half immortal. He’s a 21st century son of the ancient Greek god Poseidon on the biggest adventure of his young life — a quest to find out who stole Zeus’s lightening bolt! Together with his trusted friends, Percy travels through the United States, battling monsters and hunting the elusive title character. (Book 1 in the Percy Jackson and the Olympians series)