Nasty, Stinky Sneakers (Paperback, 1st Harper Trophy ed)

Colin has spent weeks perfecting his sneaker odor for the Stinkiest Sneakers in the World contest. If he wins, he'll get three brand-new pairs of Slam Dunkers sneakers: one for himself, one for his little sister, Amy, and one for his best pal, Webster.
But now, after weeks of working toward stinky perfection -- not washing his feet, wearing no socks, jogging to get his feet juicy, and even sleeping with his sneakers on -- the nasty, stinky sneakers are missing!