Death Beneath Jerusalem (1938) (writing as Roger Bax)
Red Escapade (1940) (writing as Roger Bax)
Disposing of Henry (1947) (writing as Roger Bax)
Blueprint for Murder (1948) (writing as Roger Bax)
     aka The Trouble with Murder
Came the Dawn (1949) (writing as Roger Bax)
     aka Two If by Sea
No Mask for Murder (1950)
     aka Fontego's Folly
No Tears for Hilda (1950)
A Press of Suspects (1951)
     aka By-Line for Murder
Murder in Moscow (1951)
     aka Murder Through the Looking Glass
A Grave Case of Murder (1951) (writing as Roger Bax)
A Hole in the Ground (1952)
The Cuckoo Line Affair (1953)
Death and the Sky Above (1953)
The Riddle of Samson (1954)
The End of the Track (1955)
The Megstone Plot (1956)
The Narrow Search (1957)
The Galloway Case (1958)
Beginner's Luck (1958) (writing as Paul Somers)
Operation Piracy (1958) (writing as Paul Somers)
A Hero for Leanda (1959)
The Shivering Mountain (1959) (writing as Paul Somers)
The Golden Deed (1960)
The Far Sands (1961)
The Broken Jigsaw (1961) (writing as Paul Somers)
The House of Soldiers (1962)
Prisoner's Friend (1962)
The Sea Monks (1963)
Frame-Up (1964)
The Ashes of Loda (1965)
Murderer's Fen (1966)
     aka Hide and Go Seek
A Very Quiet Place (1967)
The Long Short Cut (1968)
The Ascent of D-13 (1969)
Boomerang (1970)
The Late Bill Smith (1971)
The Case of Robert Quarry (1972)
The File on Lester (1974)
     aka The Lester Affair
Home to Roost (1976)
Counterstroke (1978)