Bluefeather (1928)
Death's Eye (1929)
     aka The Shadow and the Stone
Camouflage (1930)
     aka The Mystery At Newton Ferry
Storm Against the Wall (1931)
Consummate Rose (1931)
Watch the Wall (1933)
     aka The Gentlemen Go By
Paid in Full (1933)
     aka So Many Doors
Inside Out!: or, Mad As a Hatter! (1934) (writing as Geoffrey Ludlow)
Odds On Bluefeather (1935)
Third Time Unlucky (1935)
The Dividing Air (1935) (writing as Robert Eton)
On the Night of the 18th (1936)
Women Had to Do It (1936) (writing as Geoffrey Ludlow)
The Door in the Wall (1937)
The Man in the Hut (1938)
The Dandy (1938)
The House in the Hills (1938)
And Be a Villain (1939)
His Aunt Came Late (1939)
The Man Who Escaped (1940) (writing as Sidney Bedford)
The Dark Square (1941)
The Creaking Chair (1941)
The Journey (1944) (writing as Robert Eton)
The Echo in the Cave (1946)
Strange Landing (1946)
The Evil Hour (1947)
The Legacy (1947) (writing as Robert Eton)
St. Lynn's Advertiser (1947) (writing as Robert Eton)
The Bright Face Of Danger (1948)
The Lady On Platform One (1950)
Party of Eight (1950)
The Man No One Knew (1951)
Young Master Carver: A Boy in the Reign of Edward III (1952)
Policeman in the Family (1953)
Bridge Under the Water (1954)
Give Me the Knife (1954)
Under the Hollies (1954)
Where Is She Now? (1955)
Elizabeth: Young Policewoman (1955) (writing as Valerie Baxter)
Saturday Out (1956)
The Breaking Point (1957)
     aka The Great Armored Car Swindle
Sonia Back Stage (1957)
The Young Architect (1958)
District Nurse Carter (1958)
Farm Animals (1958)
Jane: Young Author (1958) (writing as Valerie Baxter)
Monica Anson: Travel Agent (1959)
Bandaberry (1960)
The House in Marsh Road (1960)
Abandoned Doll (1960)
The Pit in the Garden (1961)
Moon over Ebury Square (1962)
Sleep of the Unjust (1963)
Virgin Luck (1963)
The Dancers in the Reeds (1963)
Good Luck, Nurse Ross (1963)
More Deadly Than the Male (1964)
Scoop (1964)
Double Fault (1965)
The Empty Saddle (1965)
Break for Summer (1965)
Die By the Book (1966)
The Imperfect Aunt (1966)
Shadow in the Sun (1966)
The Suspect Scientist (1966)
The Mauve Front Door (1967)
Week-End in the Scampi Belt (1967)
Bessie Scudd: Fifty Years of a Woman's Life (1968)
Death of a Philanderer (1968)
Peter and the Picture Thief (1969)
Of Malicious Intent (1969)
Curious Crime of Miss Julia Blossom (1970)
Jimmy and the Election (1970)
The Shelter (1970)
Beginning of Words (1970)
Troy Trotter and the Kitten (1971)
A Little Matter of Arson (1972)
End of the Long Hot Summer (1972)
View from the Terrace (1972)
The Fatal Flaw (1973)
The Fortunate Miss East (1973)
One Step from Murder (1974)
The Great Cup-tie (1974)
Woman in Number Five (1974)
Burlington Square (1975)
Footpath (1975)
The Folly of Henrietta Dale (1976)
The Vision Splendid (1976)
Little Kingdom (1977)
Folly to be Wise (1977)
Dangerous Year (1978)
The Sisters (1979)
Lady Who Wasn't (1980)
Parasol in the Park (1981)
Blue Door (1982)
The Secret of the Pit (1982)
The Visitor (1983)
False Gods (1984)
Quenell's (1985)
Abiding Thing (1986)
The Rivals (1987)
The Witness for the Defence (2002)