It is Halloween, but Monster does not know what he will be. He tries on a girl mask, but it is too scary. He tries on a boy mask, but it is also too scary. Finally, after many tries, Monster has the perfect idea! Full-color illustrations.
- ISBN10 0140508791
- ISBN13 9780140508796
- Publish Date 3 October 1988
- Publish Status Out of Print
- Out of Print 14 April 1994
- Publish Country GB
- Imprint Puffin Books
- Edition Open market ed
- Format Paperback
- Pages 24
- Language English