* The Book of Madness and Horror (1927)
* The Whisperer (1929)
* Skrekkhelvete (1930)
* The Torture Squad (1932)
* Shadow of the Torture Man (1933)
* Doctor Skull's Murder Machine (1935)
* The Monster Makers (1936)
* Varulvmåne (1940)
* The Witching Moon (1941)
* The Corpse Eaters (1942)
* The Ghost Riders (1943)
* The Devil's Brew (1944)
* The Vampire's Claw (1945)
* Terrorens grav (1946)
* The Curse of the Mummy (1947)
* Den gale doktorens datter (1948)
* The House of Horror (1949)
* The Screaming Skull (1950)
* The Living Corpse (1951)
* The Thing from the Swamp (1952)
* The Giant Spider (1954)
* The Blob (1956)
* Horror of the Amazon (1958)
* Zombienes dal (1961)
Noveller
* "The Horror at Red Towers" (1926)
* "The Curse of the Mummy's Tomb" (1927)
* "The House of Horror" (1928)
* "The Ghoul's Feast" (1929)
* "Vampyrene i Venezia" (1930)
* "Varulvens klo" (1931)
* "The Zombie Master" (1932)
* "Spøkelsesskipet" (1933)
* "The Devil's Brew" (1934)
* "The Vampire's Kiss" (1935)
* "The Curse of the Mummy's Hand" (1936)
* "Den gale doktorens datter" (1937)
* "The House of Horror" (1938)
* "The Screaming Skull" (1939)
* "The Living Corpse" (1940)
* "The Thing from the Swamp" (1941)
* "The Giant Spider" (1942)
* "The Blob" (1943)
* "Horror of the Amazon" (1944)
* "Valley of the Zombies" (1945)