Rick Riordan Jr. was born June 5th 1964. He is best known for writing Percy Jackson and the Olympians series. He also wrote the adult mystery series Tres Navarre, and helped edit Demigods and Monsters.A collection of essays of his Percy Jackson series. he also helped develop the 10 books of the 39 clues and wrote the first book in series the maze of bones. In 2012 he completed a trilogy focusing on Egyptian mythology.