103 books • 26 series
Book #3: World Cup Louie
Book #10: Navigation on the Yorkshire Derwent
Book #1: Dinosaurs in the Park
Book #4: Ethan the Elf
Book #5: The Treasure Map
Book #6: Detective Louie and the Case of the Missing Dragon
Book #7: Louie's Rocket Ship
Book #1: Out of the Tunnel
Book #4: At All Costs