Jack's grandfather is always grumpy, and a bit scary, too, but during a visit to the country house where "Grumpy Grandpa" lives with the brave Aunt Ellie and Uncle Wilbur, Jack learns that his grandfather was once very different.
- ISBN10 1416908110
- ISBN13 9781416908111
- Publish Date 7 July 2009
- Publish Status Active
- Publish Country US
- Publisher Simon & Schuster
- Imprint Atheneum Books for Young Readers
- Format Hardcover
- Pages 40
- Language English