
cover art by Chris Schaare
better image than previously posted

1957 Simon and Schuster hardcover, this the 1960 softcover reprint.
Quentin was the pseudonym Hugh Wheeler
back cover says the cover art is by Robert McGuire but it doesn’t look like his work.

1953 Doubleday hardcover, this a later, 1955, reprint
also released as A Big Hand for the Corpse by the Detective Book Club in 1955
“George Bagby” was one of the pseudonym of Aaron Marc Stein, who also published as Hampton Stone
cover art by Victor Kalin
better image than previously posted