Richard Russell Riordan Jr. (/ˈraɪərdən/ RIRE-dən; born June 5, 1964)[1] 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.[2] 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.