Grinny

From Author Wars - https://authorwars.com/publications/grinny-268929.html

Overview:

Title: Grinny
Author: Nicholas Fisk
Year: Unknown
ISBN-10: 0140307451
Publisher: Puffin
Price: £3.25
Pages: 95
Binding: Paperback
Type: Novel
Title Reference: Grinny
Notes: Undated 20th printing of the 1975 Puffin edition.
The copyright page states:
Published in Puffin Books 1975
20
Back cover also lists the following prices:
Aust. $7.95
Canada $4.99