The document provides information about Percy Jackson, the main character in Rick Riordan's popular Percy Jackson & the Olympians book series. Percy Jackson is not based on a real person but is inspired by the demigod Perseus from Greek mythology. He is a problematic boy who is hyperactive and dyslexic, getting into trouble at every school due to monsters. However, he is also described as altruistic, sweet, brave, and competitive. The series has sold over 20 million copies worldwide, demonstrating Percy Jackson's popularity.