Fortress of the Six Moons

From Author Wars - https://authorwars.com/publications/fortress-of-the-six-moons-314578.html

Overview:

Title: Fortress of the Six Moons
Author: K. H. Scheer
Year: 1975
ISBN-10: 0860078515
Publisher: Orbit
Price: £0.45
Pages: 124
Binding: Paperback
Type: Chapter Book
Title Reference: Fortress of the Six Moons
Notes: First printing as per copyright page.
Wrap around cover.
Artist not credited but "F" is visible on bc.
$1.25 in Australia & NZ.
Origin of precise pub date unknown.