Hunters Trilogy
1. The Doomsday Brain (1967)
2. The Invisible Eye (1969)
3. The Torture Machine (1969)

Sneeze on a Monday (1941)
Japanese Jeopardy (1943)
Bricks Upon Dust (1945)
The Leaf of a Lime Tree (1945)
     aka He Never Came Back
Solo (1948)
Heritage of Mercy (1949)
Curtains for the Cobra (1949)
Diana Meets Murder (1949)
The Frontier (1950)
The Talking Tree (1950)
Salvatore (1951)
Perdita's End (1952)
The Green Rain (1961)
Murder in Majorca (1961)
The Survivors (1964)
Companions of the Unseen (1968)
The Cleft (1969)
Secret and Forbidden (1969)
Dress and Undress (1969)
The Demons of Sandorra (1970)
Song of the Scorpions (1971)
Anatomy of Exile (1972)
Stand Up and Fight (1972) (with Emil Brigg)
Lily Dale (1972)
The Wild White Witch (1973) (writing as Peter Stafford)
Hazard Island (1973)
Harry Price, Ghost Hunter (1974)
The Man Who Loved to Blow Up Trains (1974) (writing as Peter Stafford)
The Pleasure House (1974)

A Pictorial History of Love (1968)
Beyond the Senses (1971) (with Phyllis Raphael)
Social History of Rape (1971)
Pioneers of the Unseen (1972)
Gazetteer of Scottish and Irish Ghosts (1973) (with Peter Underwood)
Ghosts of Borley (1973) (with Peter Underwood)
Crime and the Occult: How Esp and Parapsychology Help Detection (1974)