Cosmic Checkmate
From Author Wars - https://authorwars.com/books/cosmic-checkmate-1000528.html
Overview:
- Title: Cosmic Checkmate
- Author: Ed Valigursky
- Year: 1962
- Type: Cover Art
Editions/Publications:
- Unknown. King of the Fourth Planet / Cosmic Checkmate (Unknown, Ed Valigursky, Ace Books, $0.40, 96+128 pages, dos, Omnibus)
- 2011 . Cosmic Checkmate (2011, Ed Valigursky, Gate Way Publishers, ISBN-10: 9781936432264, $1.99, pages, ebook, Novel)