The Monster Men

From Author Wars - https://authorwars.com/publications/the-monster-men-44276.html

Overview:

Title: The Monster Men
Author: Edgar Rice Burroughs
Year: 1969
Publisher: Ace Books
Price: $0.60
Pages: 159
Binding: Paperback
Type: Novel
Title Reference: The Monster Men
Notes:
"This Ace edition follows the text of the first hard-cover book edition, originally published in 1929" Date from Stuart Wells' Ace notebook Cover art and title-page illustration by Frank Frazetta on copyright page, cover artwork is also signed