Despite Penrod Porcupine's sometimes exasperating behavior, he and Griswold Bear remain good friends.
- ISBN10 0689713401
- ISBN13 9780689713408
- Publish Date 31 October 1989 (first published 30 April 1986)
- Publish Status Active
- Publish Country US
- Publisher Simon & Schuster
- Imprint Atheneum Books for Young Readers
- Edition Aladdin Books ed.
- Format Paperback (UK Trade)
- Pages 56
- Language English