Mr. and Mrs. North

The Norths Meet Murder (1940)
A Pinch of Poison (1941)
Murder Out of Turn (1941)
Death on the Aisle (1942)
Hanged for a Sheep (1942)
Death Takes a Bow (1943)
Killing the Goose (1944)
Payoff for the Banker (1945)
Death of a Tall Man (1946)
Murder Within Murder (1946)
Untidy Murder (1947)
Murder Is Served (1948)
The Dishonest Murderer (1949)
Murder in a Hurry (1950)
Murder Comes First (1951)
Dead As a Dinosaur (1952)
Curtain for a Jester (1953)
Death Has a Small Voice (1953)
Key to Death (1954)
Death of an Angel (1955)
     aka Mr & Mrs North and the Poisoned Playboy
Voyage into Violence (1956)
Long Skeleton (1958)
Murder Is Suggested (1959)
The Judge Is Reversed (1960)
Murder Has Its Points (1962)
Murder by the Book (1963)