Morton helps his friend Sidney, a shy friendly monster, to regain his place in the closet where he lives.
- ISBN10 0027284506
- ISBN13 9780027284508
- Publish Date 1 January 1987
- Publish Status Out of Print
- Out of Print 15 May 2021
- Publish Country US
- Imprint MacMillan Publishing Company
- Edition AMERICAN ed.
- Format Hardcover
- Language English