Mandy, who is usually perfectly behaved, tries acting bad like her brother and reveals to her surprised mother that there is a little monster in everyone.
- ISBN10 0749702206
- ISBN13 9780749702205
- Publish Date 30 September 1991 (first published 21 September 1989)
- Publish Status Out of Print
- Out of Print 30 January 2013
- Publish Country GB
- Imprint Mammoth
- Format Paperback
- Pages 32
- Language English