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 Dandy (1938)
The House in the Hills (1938)
The Hut (1938)
And Be a Villain (1939)
His Aunt Came Late (1939)
The Man Who Escaped (1940) (writing as Sidney Bedford)
The Creaking Chair (1941)
The Dark Square (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)
Party of Eight (1950)
The Lady On Platform One (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)
Breaking Point (1957)
     aka The Great Armored Car Swindle
Sonia Back Stage (1957)
Farm Animals (1958)
The Young Architect (1958)
District Nurse Carter (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)
The Dancers in the Reeds (1963)
Virgin Luck (1963)
Good Luck, Nurse Ross (1963)
More Deadly Than the Male (1964)
Scoop (1964)
Break for Summer (1965)
Double Fault (1965)
The Empty Saddle (1965)
The Imperfect Aunt (1966)
Shadow in the Sun (1966)
The Suspect Scientist (1966)
Die By the Book (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)
End of the Long Hot Summer (1972)
A Little Matter of Arson (1972)
View from the Terrace (1972)
The Fatal Flaw (1973)
Fortunate Miss East (1973)
One Step from Murder (1974)
Great Cup-tie (1974)
Woman in Number Five (1974)
Burlington Square (1975)
Footpath (1975)
Folly of Henrietta Dale (1976)
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)
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)