London: Alfred A. Knopf, 1931. First Edition. Very Good. First British edition, precedes the American edition. Bound in publisher's original deep blue cloth stamped in red and white, with the Knopf imprint at the base of the spine (later issues list Cassell). Very Good with lean to spine, toning to cloth at spine and edges, large but light staining to rear cover. Evidence of bookplate removal to front paste down and pages toned. A critically-acclaimed crime novel first serialized in Black Mask magazine, made into a film twice.