Grinny

From Author Wars - https://authorwars.com/publications/grinny-238133.html

Overview:

Title: Grinny
Author: Nicholas Fisk
Year: 1975
ISBN-10: 0140307451
Publisher: Puffin
Price: £0.25
Pages: 95
Binding: Paperback
Type: Novel
Title Reference: Grinny
Notes: Copy used for the data on this record appears to be the first printing of the Puffin edition. The cover shows a boy in pyjamas looking at a person lying in a wrought iron framed bed.

Back cover also lists the following prices:
Australia $0.75
New Zealand $0.75
Canada $0.95