Your Casket Awaits, Madame (1957)
A Crime for Christmas (1959)
From This Death Forward (1959) (writing as Mary Wallace)
The Pink Castle (1959) (writing as Claire Vincent)
The Silken Web (1961)
Pale Hand of Danger (1962)
Spellbound (1966) (writing as Claire Vincent)
     aka Unholy Spell
Amber Twilight (1967)
Blacktower (1967)
Graymists (1967)
The Doomsday Bells (1968)
Garden of Satan (1969) (writing as Claire Vincent)
Journey into Twilight (1970)
Doctor Garrett's Girl (1970)
Bells of Widows Bay (1971)
An Echo of Weeping (1971)
The Witches of Windlake (1971)
The Mark of the Rope (1972)
Where Shadows Lie (1972)
The Witch's Song (1972)
Hate Thy Neighbor (1973)
From Secret Places (1973)
House of Yesteryear (1974)
The Road to Midnight (1974)
Where Evil Waits (1974)
Devils Mirror (1974)
Creighton's Castle (1975)
Unwilling Rebel (1975)
The Brides of Lucifer (1976)
Witches' Holiday (1976)
Winter in a Dark Land (1976)
Moon of Darkness (1977)
The Lonely Toys (1978)
Believing in Giants (1978) (writing as Claire Vincent)
You'll Be the Death of Me (1979)
Time to Kill (1979)
Regency Ball (1980)
Regency Rose (1980)
Flowering Green (1981)
Fair Imposter (1981)
Girl in the Shadows (1982)
Dark Magic (1983)

Amber Twilight / Portrait of Terror (1967) (with Paula Minton)
Villa Fountains / The Deadly Rose (1968) (with Virginia Coffman)