Dorothy L. Sayers - Strong poison
Avon Books, 1951
(via pulpcovers)
Roy Huggins - 77 Sunset Strip, cover by Robert McGinnis.
Roy Huggins created the 77 Sunset Strip TV series (based on his first novel, The Double Take, 1946), The Fugitive, The Rockford Files, and the great but totally forgotten today City of Angels.
More on him at the Thrilling Detective Web Site.
Cover of Adventure, June 1957, art by Mort Kunstler (as Emmett Kaye).