Gentle Invaders

From Author Wars - https://authorwars.com/publications/gentle-invaders-444783.html

Overview:

Title: Gentle Invaders
Author: Hans Stefan Santesson
Year: 1969
Publisher: Belmont Books
Price: C$0.60
Pages: 176
Binding: Paperback
Type: Anthology
Title Reference: Gentle Invaders
Notes:
• "BELMONT BOOKS—May 1969" • Printing not stated, no number line • The artist is not credited, no visible signature on the artwork • Cover printed in the US, book in Canada