Perseus "Percy" Jackson is a fictional and central character in Rick Riordan's Camp Half-Blood book series, appearing as the title character and narrator in the first series, Percy Jackson & the Olympians, and a major character in the second series, The Heroes of Olympus. At the start of the first series, Percy is introduced as a troubled twelve-year-old diagnosed with both ADHD and dyslexia. After getting attacked at school, he is escorted to Camp Half-Blood, a secret camp built to train and protect Greek demigods. At camp, Percy learns that his father is Poseidon, the god of the sea, and is thus a child mentioned in the Great Prophecy, a prophecy that was given by the Oracle seventy years ago. Throughout the series, Percy embarks on several quests to save his friends and the Olympian gods of Mount Olympus. He also appeared in the movie.