Percy Jackson &amp; the Olympians

Percy Jackson &amp; the Olympians is a series of five adventure and fantasy novels written by Rick Riordan, an American author. It is set in the modern United States, but it is based on Greek mythology. The series has five books total. There are also other books outside the series like "The Demigod Files" and "Demigods and Monsters" that are related to the series.
Percy Jackson is the protagonist (main character), or hero, of the series. He discovers that he is a son of the Greek god Poseidon. He meets many half-bloods (demigods) like him, such as Annabeth Chase and Luke Castellan. He also becomes friends with a satyr named Grover Underwood.
As of March 5, 2010, the series had been on the "New York Times" Best Seller list for children's books for 138 weeks.
Main characters.
Listed are the major characters in the series.
Minor characters.
Here is a list of some other characters:
Movie.
Chris Columbus directed the movie adaptation of the first book, "The Lightning Thief" for 20th Century Fox. There is also a sequel series of books called The Heroes of Olympus. Logan Lerman, Brandon T. Jackson and Alexandra Daddario play Percy, Grover and Annabeth respectively.
Influences.
There are many websites built by fans dedicated to the "Percy Jackson and the Olympians" series.