The Rim of Space

From Author Wars - https://authorwars.com/books/the-rim-of-space-1015277.html

Overview:

Title: The Rim of Space
Author: Ed Valigursky
Year: 1962
Type: Cover Art

Editions/Publications:

Unknown. The Rim of Space / Secret Agent of Terra (Unknown, Ed Valigursky, Ace Books, $0.40, 128+127 pages, dos, Omnibus)