Separated at...the knuckle?

(Popular Library, 1962)
and...

               (Popular Library, 1965)

from the Contento index:

Blood Runs Cold Robert Bloch (Simon & Schuster, 1961, $3.50, 246pp, hc, cover by Tony Palladino)
Also in pb (Popular Oct ’62).

• The Show Must Go On · ss Mike Shayne Mystery Magazine Jan 1960
• The Cure · ss Playboy Oct 1957
• Daybroke · ss Star Science Fiction Magazine Jan 1958
• Show Biz · ss Ellery Queen’s Mystery Magazine May 1959
• The Masterpiece · ss Rogue Jun 1960
• I Like Blondes · ss Playboy Jan 1956
• Dig That Crazy Grave! · ss Ellery Queen’s Mystery Magazine Jun 1957
• Where the Buffalo Roam · ss Other Worlds Science Stories Jul 1955
• Is Betsy Blake Still Alive? · ss Ellery Queen’s Mystery Magazine Apr 1958
• Word of Honor · ss Playboy Aug 1958
• Final Performance · ss Shock—The Magazine of Terrifying Tales Sep 1960
• All on a Golden Afternoon · nv F&SF Jun 1956
• The Gloating Place · ss Rogue Jun 1959
• The Pin · ss Amazing Dec 1953/Jan ’54
• I Do Not Love Thee, Doctor Fell · ss F&SF Mar 1955
• The Big Kick · ss Rogue Jul 1959
• Sock Finish · nv Ellery Queen’s Mystery Magazine Nov 1957

Shock! ed. M. C. Allen (New York: Popular Library SP375, 1965, 50¢, 144pp, pb) 7 · The Destructors · Graham Greene · ss Picture Post Jul 24 1954 (+1) 23 · Evening Primrose · John Collier · ss 1940 35 · Miriam · Truman Capote · ss Mademoiselle Jun 1945 48 · Earth to Earth · Robert Graves · ss Punch Feb 1955; ; as “The Steinpilz Method”, Ellery Queen’s Mystery Magazine Apr 1956 54 · The Small Assassin · Ray Bradbury · ss Dime Mystery Magazine Nov 1946 73 · The Hunger · Charles Beaumont · ss Playboy Apr 1955 88 · Thompson · George A. Zorn · ss Story v35 #8 1962 112 · Suspicion · Dorothy L. Sayers · ss Mystery League Oct 1933; Ellery Queen’s Mystery Magazine Dec 1950 129 · You Can’t Run Fast Enough · Arthur Kaplan · ss Alfred Hitchcock’s Mystery Magazine Apr 1958 138 · The Man and the Snake · Ambrose Bierce · ss San Francisco Examiner Jun 29 1890

...Two Robert Bloch collections
...Robert Bloch on Sweet Freedom
...Tony Palladino design and illustration
...some suspense fiction anthologies
...and some more