The Stars Grow Pale (1937)
Journey Into Morning (1945)
The Young Invader (1947)
The Sharon Woman (1950)
First, the Dream (1951)
Goodbye, My Love (1952)
The Music of Our House (1952)
The Secret of the Rose (1952)
Her Name Was Eve (1953)
The Heart Is Never Fair (1954)
Prelude to Louise (1954)
Shadow of a Stranger (1960)
Bridge to the Moon (1960)
Someone Waiting (1961) (writing as Katherine Troy)
Stay Until Tomorrow (1961)
Whisper in the Dark (1961) (writing as Katherine Troy)
The Night My Enemy (1962)
I Am Gabriella (1962)
Green Fire (1963)
Enchanter's Nightshade (1963) (writing as Katherine Troy)
     aka The Winds of Night
The Brides of Bellenmore (1964)
Falcon's Shadow (1964) (writing as Katherine Troy)
My Dearest Elizabeth (1964)
The Pavilion At Monkshood (1965)
Jessica (1965)
The House of Fand (1966) (writing as Katherine Troy)
The Moonlit Door (1967)
Night of the Enchantress (1967) (writing as Katherine Troy)
Minerva Stone (1968)
Farramonde (1968) (writing as Katherine Troy)
Roseheath (1969) (writing as Katherine Troy)
The Teracotta Palace (1970)
Storm Over Roseheath (1970) (writing as Katherine Troy)
Ride a White Dolphin (1971)
Walk in the Paradise Garden (1972)
The Midnight Dancers (1973)
Jessamy Court (1975)
The Jeweled Daugher (1976)
Dark Star (1978)
Gabriella (1978)
Radiance (1979)
Invitation to Alannah (1983)