The Shadow People

From Author Wars - https://authorwars.com/publications/the-shadow-people-407282.html

Overview:

Title: The Shadow People
Author: Margaret St. Clair
Year: 1969
Publisher: Dell
Price: C$0.60
Pages: 189
Binding: Paperback
Type: Novel
Title Reference: The Shadow People
Notes:
• "First printing—August 1969"; no number line • "Cover: Jones" on back cover, the artwork is signed • Cover printed in the US, book in Canada