Hazel sets out to prove that she, not her baby brother, is the worst monster anywhere. Since the Baby Monster arrived, no one notices big sister Hazel's talents. When Billy wins the Worst Monster Baby in the World contest, that's the final straw--Hazel must prove that she is the Worst Monster in the World.
- ISBN10 0140505652
- ISBN13 9780140505658
- Publish Date 30 October 1986 (first published 1 January 1985)
- Publish Status Out of Print
- Out of Print 13 July 1995
- Publish Country GB
- Imprint Puffin Books
- Edition New edition
- Format Paperback
- Pages 32
- Language English