Richard Russell Riordan Jr. ( RY-ər-dən; born June 5, 1964) is an American author, best known for his Camp Half-Blood Chronicles, which includes the Percy Jackson & the Olympians series, The Heroes of Olympus series, The Trials of Apollo series, and The Nico di Angelo Adventures 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 f...
