* Mørkets mester (1931)
* The Scourge (1933)
* In the Claws of the Eagle (1934)
* Tempelherrernes blod (1935)
* Faraoernes forbandelse (1936)
* Inkaernes hemmelighed (1937)
* Mayaernes mysterium (1938)
* The Riddle of the Sphinx (1939)
* The Ghost of Belshazzar (1940)
* Skyggen af Alexander den Store (1941)
* The Last of the Borgias (1942)
* Konstantinopels fald (1943)
* Belejringen af Wien (1944)
* Slaget ved Waterloo (1945)
* The Charge of the Light Brigade (1946)
* The Myttery on the Bounty (1947)
* Guldfeberen (1948)
* The California Trail (1949)
* The Oregon Trail (1950)
* The Santa Fe Trail (1951)
* The Chisholm Trail (1952)
* The Natchez Trace (1953)
* The Wilderness Road (1954)
* The Cumberland Road (1955)
* The Old Spanish Trail (1956)
* The Mormon Trail (1957)
noveller:
* The Werewolf of London (1927)
* The Vampire of Paris (1928)
* Prags Golem (1929)
* Mumien fra Theben (1930)
* The Witch of Endor (1932)
Andre værker:
* Albaniens historie (1939)
* Balkankrigene (1940)
* Første Verdenskrig (1941)
* Anden Verdenskrig (1942)
* Den kolde krig (1943)
* De Forenede Staters Historie (1944)
* Europas historie (1945)
* Verdenshistorien (1946)
* Bibelen (1947)
* Koranen (1948)
* The Bhagavad Gita (1949)
* The Tao Te Ching (1950)
* The Analects of Confucius (1951)
* The Dhammapada (1952)
* The Upanishads (1953)
* Vedaerne (1954)
* The Zend-Avesta (1955)
* The Popol Vuh (1956)
* The Rigveda (1957)