Richard Russell Riordan Jr. (born June 5, 1964) is an American author. He is known for writing the Percy Jackson & the Olympians series, about a teenager named Percy Jackson who discovers he is a son of the Greek god Poseidon. Riordan's books have been translated into forty-two languages and sold more than thirty million copies in the US. 20th Century Fox adapted the first two books of his Percy Jackson series as part of a series of films. His books have spawned related media, such as graphic novels and short story collections. Riordan's first full-length novel was Big Red Tequila, which became the first book in the Tres Navarre series. His big breakthrough was The Lightning Thief (2005). His most recent publications are three books in the Magnus Chase and the Gods of Asgard series, based on Norse mythology. The first book of his The Trials of Apollo series, The Hidden Oracle, was released in May 2016. Less