1949 Dell mapback reissue
cover art by Gerald Gregg
better image than previously posted
Category: pulp
unknown
January 1941 issue
August 1942 British edition
cover art by Harry Schaare
August 1944 issue
December 1946 issue ~ cover by H. W. McCauley
January 1938 issue ~ cover art by Rafael DeSoto
1962 Signet paperback original – cover art by Robert McGinniks
cover art by Robert McGinnis
first published in Australia by Horowitz, 1962, then in the US by Signet, a paperback original
cover art repurposed for 1967 Signet by James Dark
SMB Noir 