The Monster Men

From Author Wars - https://authorwars.com/publications/the-monster-men-248606.html

Overview:

Title: The Monster Men
Author: Edgar Rice Burroughs
Year: 1977
Publisher: Ace Books
Price: $1.50
Pages: 185
Binding: Paperback
Type: Novel
Title Reference: The Monster Men
Notes:
No edition or printing stated.
Date from Locus #198 (January 30, 1977)
The artist is not credited, the artwork is clearly signed [cropped on some copies]
OCLC has no record specific to the catalog # or year