World of the Sleeper (frontispiece)

From Author Wars - https://authorwars.com/books/world-of-the-sleeper-frontispiece-1000768.html

Overview:

Title: World of the Sleeper (frontispiece)
Author: Jack Gaughan
Year: 1967
Type: Interior Art

Editions/Publications:

Unknown. The Last Castle / World of the Sleeper (Unknown, Jack Gaughan, Ace Books, $0.60, 71+184 pages, dos, Omnibus)