Frank and Carl try to figure out why no one wants to buy their hats while other vendors are attracting many customers.
- ISBN10 0399252754
- ISBN13 9780399252754
- Publish Date 10 June 2010
- Publish Status Out of Stock
- Publish Country US
- Imprint G. P. Putnam's Sons
- Format Hardcover
- Pages 32
- Language English