The Walnut Cup, the only American stop on the World Squirrel Soccer League tour, is taking place in Elliot's park, but when the game ball, a perfectly round walnut, goes missing it is up to Elliot and his friends to find it.
- ISBN10 054501932X
- ISBN13 9780545019323
- Publish Date 1 April 2009
- Publish Status Active
- Publish Country US
- Imprint Scholastic US
- Format Hardcover
- Pages 80
- Language English