Percy Jackson and the Olympians is a series of five fantasy-adventure novels written by Rick Riordan. The novels chronicle the adventures of a young demigod named Percy Jackson and his friends as they confront Greek mythology in modern-day America. The five books in the series are The Lightning Thief, The Sea of Monsters, The Titan's Curse, The Battle of the Labyrinth, and The Last Olympian.
The series has sold more than 45 million copies worldwide, making it one of the best-selling series of all time. The Percy Jackson and the Olympians books have been adapted into two feature films, with the first, Percy Jackson & the Olympians: The Lightning Thief, released in 2010.
Overall, the Percy Jackson and the Olympians series consists of five books.