Anthony Slade and Department X2

The Case of the Marsden Rubies (1929)
The Gillespie Suicide Mystery (1929)
     aka The Terrace Suicide Mystery
The Grand Modena Murder (1931)
Is This Revenge? (1932)
     aka The Serpentine Murder
The Stolen Home Secretary (1932)
     aka The Stolen Statesman
The Riddle of the Ravens (1934)
The Secret of Tangles (1934)
The Yellow Bungalow Mystery (1935)
Who killed Oliver Cromwell? (1937)
The Arsenal Stadium Mystery (1939)
Tragedy in E Flat (1939)
Murder First Class (1946)
Atomic Murder (1947)
Hangman's Moon (1950)
They Kidnapped Stanley Matthews (1950)
The Frightened Chameleon (1951)
Murder Out of Season (1952)
The Glass Alibi (1952)
She Died Laughing (1953)
The Inverted Crime (1954)
Death Pays the Piper (1956)
Stand-In for Murder (1957)
Don't Argue with Death (1959)
Wantons Die Hard (1961)
Heads You Die (1964)
The Violent Dark (1965)
Strip-Tease Macabre (1967)
A Diplomat Dies (1969)
Alias the Victim (1971)
Programmed for Death (1973)
You Can't Die Tomorrow (1975)
Crime on Her Hands (1977)
Death Needs No Alibi (1979)

The Case-Book of Anthony Slade (1937)
Superintendent Slade Investigates (1956)