Jigsaw Jones: The Case of the Smelly Sneaker by James Preller

Back in print, this favorite series for readers 6+ will appeal to all junior detectives.  It's the girls versus the boys in the biggest football game of the year.  When one of Bigs Maloney's smelly sneakers goes missing - could this "secret weapon" have been swiped by the girls? - Jigsaw and fellow sleuth Mila must solve the mystery and save the day.  Perfect for mystery loving clue solvers.  Ages 6 +