Shadow of Evil

From Author Wars - https://authorwars.com/publications/shadow-of-evil-395815.html

Overview:

Title: Shadow of Evil
Author: Greye La Spina
Year: 1966
Publisher: Paperback Library
Price: $0.50
Pages: 160
Binding: Paperback
Type: Novel
Title Reference: Shadow of Evil
Notes:
- Data from Tuck, who lists it as a separate novel but Reginald has it as a retitled version of Invaders from the Dark as does OCLC
- Cover states the original title
Bottom of spine (seen on ebay.com) has the number 4 below catalog ID and price. Month from: https://hauntedhearts.wordpress.com/category/shadow-of-evil-by-greye-la-spina/. Cover artist from: https://hauntedhearts.wordpress.com/category/cover-art-lou-marchetti/.