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

Captain Heimrich (with Richard Lockridge)
6. Death by Association (1952)
     aka Trial by Terror
8. Death and the Gentle Bull (1954)
     aka Killer in the Straw
10. Let Dead Enough Alone (1956)
12. Accent on Murder (1958)
13. Show Red for Danger (1960)
14. With One Stone (1961)
     aka No Dignity in Death
Think of Death (1947)
I Want to Go Home (1948)
Spin Your Web, Lady (1949)
Foggy, Foggy Death (1950)
A Client Is Cancelled (1951)
Stand Up and Die (1953)
Burnt Offering (1955)
Practise to Deceive (1957)
The Distant Clue (1963)
First Come, First Kill (1963)

The Faceless Adversary (1956) (with Richard Lockridge)
     aka Case of the Murdered Redhead
The Tangled Cord (1957) (with Richard Lockridge)
Catch As Catch Can (1958) (with Richard Lockridge)
The Innocent House (1959) (with Richard Lockridge)
Murder and Blueberry Pie (1959)
     aka Call It Coincidence
The Golden Man (1960) (with Richard Lockridge)
The Drill Is Death (1961) (with Richard Lockridge)
And Left for Dead (1961) (with Richard Lockridge)
Night of Shadows (1962) (with Richard Lockridge)
The Ticking Clock (1962) (with Richard Lockridge)
The Devious Ones (1964) (with Richard Lockridge)
     aka Four Hours to Fear
Quest for the Bogeyman (1964) (with Richard Lockridge)
Quest of the Bogeyman (1965) (with Richard Lockridge)

Missing Widow / Scarlet Feather / I Want to Go Home (1948) (with Anthony Gilbert, Frank Gruber)