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)
Dress and Undress (1969)
Secret and Forbidden (1969)
The Cleft (1969)
The Demons of Sandorra (1970)
Song of the Scorpions (1971)
Anatomy of Exile (1972)
Lily Dale (1972)
Stand Up and Fight (1972) (with Emil Brigg)
The Wild White Witch (1973) (writing as Peter Stafford)
Hazard Island (1973)
The Pleasure House (1974)
Harry Price, Ghost Hunter (1974)
The Man Who Loved to Blow Up Trains (1974) (writing as Peter Stafford)

Pictorial History of Love (1968)
Social History of Rape (1971)
Beyond the Senses (1971) (with Phyllis Raphael)
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)