'Percy Jackson and the Olympians (often referred to as just Percy Jackson) is a fantasy series by Rick Riordan. The series consists of two main series, Percy Jackson and the Olympians (The Lightning Thief, The Sea of Monsters, The Titan's Curse, The Battle of the Labyrinth and The Last Olympian) and The Heroes of Olympus (The Lost Hero, The Son of Neptune, The Mark of Athena, The House of Hades and The Blood of Olympus) as well as several spinoff titles, such as databooks and graphic novels. Two movies have been made from the first two books, and video games based off those movies have been made.