The Strange Invaders

From Author Wars - https://authorwars.com/publications/the-strange-invaders-279430.html

Overview:

Title: The Strange Invaders
Author: Alun Llewellyn
Year: 1977
ISBN-10: 0450030032
Publisher: New English Library
Price: £0.80
Pages: 208
Binding: Paperback
Type: Novel
Title Reference: The Strange Invaders
Notes: 1st printing.
Part of the Master SF series.
Other prices: Rep. of Ireland 88p, Cyprus 850 mils, Gibraltar 90p, Malta 85c, New Zealand $2.30, Spain Pts 210, Trinidad (W.I.) $4.80, Canada $2.95, Australia $2.25.
Artist credited in this pub.