* Bankmanden (1914)
* Paul og Virginia (1914)
* Pauline Bradford:A Tale of the Border (1915)
* Jernhælen (1915)
* Bygningen af den "smukke by" (1916)
* Den lilla parasol (1916)
* The Broken Lance (1917)
* The Call of the East (1918)
* Terrorlandet (1918)
* The Shadow of the Past (1919)
* The Desert Healer (1920)
* The Jade God (1921)
* Havulven (1921)
* Beyond the Wall (1922)
* Kæmpernes dal (1923)
* Den store kamp (1924)
* The Fighting Blade (1925)
* Orientens flamme (1926)
* The Jungle Trail (1927)
* Den Gyldne By (1928)
* The Crimson Circle (1929)
* The Hidden Empire (1930)
* The Lost Colony (1931)
* The Tower of Doom (1932)
* Byen i himlen (1933)
* Kongernes Dal (1934)
* Fareøen (1935)
* Mørkets land (1936)
* Stjernernes dal (1937)
* Byen ved tidens ende (1938)
* The Lost World of Atlantis (1939)
* Kæmpernes land (1940)
* Byen under havet (1941)
* De dødes dal (1942)
* The Shadow of the Gods (1943)
* The City of Doom (1944)
* De levende dødes land (1945)
* The Valley of the Mists (1946)
* Drømmenes by (1947)
* The Land of Faerie (1948)
* Enhjørningernes dal (1949)
* Fortryllelsens by (1950)
* Illusionens land (1951)
* The Valley of the Shadows (1952)
* Mørkets by (1953)
* Dødens land (1954)
* Fortvivlelsens dal (1955)
* The City of Destruction (1956)
* Kaoslandet (1957)
* The Valley of Annihilation (1958)
* Helvedes by (1959)
* De fordømtes land (1960)
* The Valley of the Apocalpyse (1961)
Noveller:
* "De tusinde vidunderes by" (1913)
* "Manden der ikke kunne dø" (1914)
* "Den usynlige kraft" (1915)
* "Dødsstrålen" (1916)
* "Tidsmaskinen" (1917)
* "Kæmpernes dal" (1918)
* "Månens skygge" (1919)
* "The Crystal of Atlantis" (1920)
* "Orientens flamme" (1921)
* "The Jungle Trail" (1922)
* "Den Gyldne By" (1923)
* "The Crimson Circle" (1924)
* "Det skjulte imperium" (1925)
* "The Lost Colony" (1926)
* "The Tower of Doom" (1927)
* "Byen i himlen" (1928)
* "Kongernes Dal" (1929)
* "The Island of Peril" (1930)
* "Mørkets land" (1931)
* "Stjernernes dal" (1932)
* "Byen ved tidens ende" (1933)
* "The Lost World of Atlantis" (1934)
* "Kæmpernes land" (1935)
* "Byen under havet" (1936)
* "De dødes dal" (1937)
* "The Shadow of the Gods" (1938)
* "The City of Doom" (1939)
* "De levende dødes land" (1940)
* "Tågernes dal" (1941)
* "Drømmenes by" (1942)
* "Færiens land" (1943)
* "Enhjørningenes dal" (1944)
* "Fortryllelsens by" (1945)
* "The Land of Illusion" (1946)
* "Skyggernes dal" (1947)
* "Mørkets by" (1948)
* "Dødens Land" (1949)
* "Fortvivlelsens dal" (1950)
* "The City of Destruction" (1951)
* "Kaoslandet" (1952)
* "The Valley of Annihilation" (1953)
* "The City of Hell" (1954)
* "De fordømtes land" (1955)
* "Apokalypsens dal" (1956)
Poesi:
* Balladen om den smukke by (1916)
* The Song of the Sea Wolf (1921)
* The Hymn of the Jungle Trail (1927)
* Ode til den gyldne by (1928)
* The Epic of the Crimson Circle (1929)
* Sagaen om det skjulte imperium (1930)
* The Legend of the Lost Colony (1931)
* The Myth of the Tower of Doom (1932)
* Drømmen om byen i himlen (1933)
* The Vision of the Valley of the Kings (1934)
* The Prophecy of the Island of Peril (1935)
* The Warning of the Land of Darkness (1936)
* The Call of the Valley of the Stars (1937)
* The Promise of the City at the End of Time (1938)
* The Revelation of the Lost World of Atlantis (1939)
* Opdagelsen af giganternes land (1940)
* Erobringen af byen under havet (1941)
* The Triumph of the Valley of the Dead (1942)
* The Redemption of the Shadow of the Gods (1943)
* The Deliverance of the City of Doom (1944)
* The Resurrection of the Land of the Living Dead (1945)
* The Transfiguration of the Valley of the Mists (1946)
* The Ascension of the City of Dreams (1947)
* The Apoteosis of the Land of Faerie (1948)
* Enhjørningernes guddommeliggørelse (1949)
* Fortryllelsens by (1950)
* The Disillusion of the Land of Illusion (1951)
* The Desolation of the Valley of the Shadows (1952)
* The Destruction of the City of Darkness (1953)
* Udslettelse af Dødslandet (1954)
* The Annihilation of the Valley of Despair (1955)
* The Devastation of the City of Destruction (1956)
* The Dissolution of the Land of Chaos (1957)
* The Eradication of the Valley of Annihilation (1958)
* The Desecration of the City of Hell (1959)
* The Damnation of the Land of the Damned (1960)
* The Apocalypse of the Valley of the Apocalypse (1961)