After his dog tangles with a porcupine, Christopher fears for his pet's safety until he thinks of a way to pacify the porcupine.
- ISBN10 0395301718
- ISBN13 9780395301715
- Publish Date 1 March 1981
- Publish Status Out of Print
- Out of Print 6 December 2011
- Publish Country US
- Imprint Houghton Mifflin
- Format Paperback
- Language English