Secret Agent X, September 1938 (cover)
From Author Wars - https://authorwars.com/books/secret-agent-x-september-1938-cover-1547951.html
Overview:
Editions/Publications:
- Unknown. Secret Agent-X: A History (Unknown, Leo Morey, Robert Weinberg, $5.50, 96 pages, Trade Paperback, Non-fiction)
- Unknown. Secret Agent-X (Unknown, Leo Morey, Golden Perils Press & Fading Shadows, $7.95, 92 pages, unknown, Non-fiction)