Tower of Glass

From Author Wars - https://authorwars.com/books/tower-of-glass-2181266.html

Overview:

Title: Tower of Glass
Author: Colin Hay
Year: 1979
Type: Interior Art

Editions/Publications:

Unknown. Space Wars: Worlds and Weapons (Unknown, Colin Hay, Crescent Books, ISBN-10: 0517273446, $5.98, 96 pages, Hardcover, Non-fiction)
Unknown. Space Wars: Worlds and Weapons (Unknown, Colin Hay, Octopus Books, ISBN-10: 070641005X, £3.95, 96 pages, Hardcover, Non-fiction)