Original: The multi-award-winning Tres Navarre mystery series , intended for adults , follows the fast-paced adventures of an erudite Texan private eye . Riordan also helped create the young adult series The 39 Clues ; he authored several of its books , including The Maze of Bones , which topped the New York Times Best Seller list on September 28 , 2008 .
Simplified: Riordan is the multi-award-winning author of the Tres Navarre mystery series for adults ; his The Maze of Bones reached number one on the New York Times Best Seller list on September 28 , 2008 .