School becomes a battleground when an instant rivalry develops between two third graders determined to prove who is the best inventor.
- ISBN10 0670841528
- ISBN13 9780670841523
- Publish Date 1 October 1991
- Publish Status Out of Stock
- Out of Print 29 January 2010
- Publish Country US
- Imprint Penguin Books Ltd
- Format Hardcover
- Pages 70
- Language English