Bertrand the dump truck is always grumpy and mean, but a chance encounter with a porcupine reveals that his bad mood has a cause.
- ISBN10 0375958398
- ISBN13 9780375958397
- Publish Date 14 July 2009
- Publish Status Remaindered
- Out of Print 12 March 2014
- Publish Country US
- Imprint Alfred A. Knopf Books for Young Readers
- Format Hardcover
- Pages 40
- Language English