* "Dark Interval" (1946)
* "Blood Tide" (1950)
* "Häxan" (1952)
* "The House of Shadows" (1953)
* "The Haunted Room" (1954)
* "The Devil's Spawn" (1955)
* "Shadows of Evil" (1956)
* "The Curse of Salem" (1957)
* "Skräcken från djupet" (1958)
* "The Night of the Screaming Skulls" (1959)
* "The Ghoul" (1960)
* "Varulven från Paris" (1961)
* "Vampyren från Venedig" (1962)
* "Mumien från Thebe" (1963)
* "The Phantom of the Opera" (1964)
* "The Man Who Could See Tomorrow" (1965)
* "The Invisible Avenger" (1966)
* "The Secret of the Black Tower" (1967)
* "Den gyllene drakens skatt" (1968)
* "De förlorade själarnas ö" (1969)
* "De fördömdas dal" (1970)
Facklitteratur:
* "The Real Sherlock Holmes" (1957)
* "Världens mest mystiska mord" (1959)
* "The Strange Story of Jack the Ripper" (1961)
* "The Bermuda Triangle Mystery" (1964)
* "Loch Ness-monstret:fakta eller fiktion?" (1966)
* "The Yeti:The Abominable Snowman" (1968)
* "The World of the Supernatural" (1970)