Whenever there’s trouble in Axelburg, Clarence is ready to pump up, rev up, and transform into Mighty Truck to save the day! But when there’s danger at the biggest, muddiest event in town, Clarence is in a jam. Can he zoom into action without revealing his secret to best pal Bruno and the whole crowd? Friendship is thicker than mud in , an all-wheel-drive adventure illustrated by Troy Cummings and written by award-winning, bestselling author Chris Barton.