* The House of Shadows (1928)
* The Island of Desire (1930)
* The Phantom Forest (1931)
* The Gates of Doom (1932)
* The Lost Continent (1934)
* The Valley of the Giants (1936)
* The City of the Dead (1938)
* The Temple of the Sun (1940)
* The Land of the Living Dead (1942)
* The Kingdom of the Damned (1944)
Μη μυθοπλασία:
* The Secret of Atlantis (1932)
* The Mystery of the Great Pyramid (1935)
* The Ancient World (1937)
* The Story of the Earth (1939)
* The Wonders of the World (1941)
* The Universe and its Mysteries (1943)
* The Earth and its Neighbors (1945)
* The Story of Man (1947)
* The Mysteries of Life and Death (1949)