Walnut Cup (Elliot's Park #3)

The Walnut Cup, the only American stop on the World Squirrel Soccer League tour, is taking place in Elliot's park this year! Teams are arriving from around the globe and excitement's running high. But when nut-crazy Pistachio steals the game ball (a perfectly round walnut), it's up to Elliot and the rest of the gang to get it back. Only trouble is, Pistachio is hiding out on an island in the middle of the pond and Wilma the goose has got her eye on the ball. Can Elliot and his friends get the game ball back before Wilma gets her bill on it and before the Elliot's park team has to forfeit the tournament?