Richard Russell Riordan Jr. is an American author, best known for writing the Percy Jackson & the Olympians series. Riordan's books have been translated into forty-two languages and sold more than thirty million copies in the United States. 20th Century Fox adapted the first two books of his Percy Jackson series as part of a series of films in which Riordan was not involved. Riordan currently serves as a co-creator and executive producer on the television series adaption of the book series that was released on Disney+ in 2023. Riordan's books have also spawned other related media, such as graphic novels and short story collections.

Percy Jackson & the Olympians is a series of fantasy novels written by American author Rick Riordan. The first book series in his Camp Half-Blood Chronicles, the novels are set in a world with the Greek gods in the 21st century. The series follows the protagonist Percy Jackson, a young demigod, who must prevent the Titans, led by Kronos, from destroying the world.