Shadow on the Stones

From Author Wars - https://authorwars.com/publications/shadow-on-the-stones-292218.html

Overview:

Title: Shadow on the Stones
Author: Moyra Caldecott
Year: 1979
ISBN-10: 0552111627
Publisher: Corgi
Price: £0.95
Pages: 158
Binding: Paperback
Type: Novel
Title Reference: Shadow on the Stones
Notes:
UK 95p
Australia $2.95
New Zealand $2.95
Rep. of Ireland £1.04½
The cover artist does not appear to be acknowledged and the artwork does not appear to include a signature. The cover is uniform with the 1979 Corgi editions of the 2 earlier books in the series.