* _Her Masterpiece: A Romance of the Art World_ (1902)
* _Captain Legare_ (1904)
* _The Ruling Passion_ (1906)
* _The High Caste: Two Tales of Southern Life_ (1908)
* _His Last Bow_ (1909)
* _The Marriage of John Marr and Other Stories_ (1910)
* _The Secret Room_ (1911)
* _The Kind Adventure_ (1913)
* _The Open Door_ (1914)
* _The Triumph of the Man Who Acts_ (1916)
* _The Rainbow Chaser_ (1917)
* _The Call of the Soul_ (1920)
* _The Little Red Footstool_ (1921)
* _Man to Man_ (1922)
* _Through the Year with Albert James Willett_ (1924)
* _The Valley of Fear_ (1925)
* _The Man and the Woman_ (1926)
* _The Great Betrayal_ (1928)
* _The Stolen Marriage_ (1930)
* _The House Over the Way_ (1932)
* _The White Tiger_ (1934)
* _The Shadow's Edge_ (1936)
* _The Crimson Trail_ (1938)
* _The Fatal Fortune_ (1940)
* _The Woman in Chains_ (1942)
* _The Dark Road_ (1944)
* _The Secret Witness_ (1946)
* _The Hidden Hand_ (1948)
* _The Man Behind the Curtain_ (1950)
* _The House of Secrets_ (1952)
* _The Clue in the Candle_ (1954)
* _The Phantom Clue_ (1956)
* _The Invisible Witness_ (1958)
* _The Silent Room_ (1960)
* _The Haunting Shadow_ (1962)
* _The Mysterious Message_ (1964)
* _The Shadow on the Wall_ (1966)
* _The Terror by Night_ (1968)
* _The Face in the Mist_ (1970)
* _The Voice from the Past_ (1972)
Short stories
* "The Man Who Saw Tomorrow" (1902)
* "A Duel with Destiny" (1903)
* "The House of Horror" (1904)
* "The Mystery of the Lost Soul" (1905)
* "The Avenging Hand" (1906)
* "The Phantom Ship" (1907)
* "The Curse of the Mummy" (1908)
* "The Secret of the Seven Keys" (1909)
* "The Island of Death" (1910)
* "The Man in the Mirror" (1911)
* "The Devil's Bargain" (1912)
* "The Werewolf of Paris" (1913)
* "The Vampire of Venice" (1914)
* "The Monster of Frankenstein" (1915)
* "The Invisible Man" (1916)
* "The Picture of Dorian Gray" (1917)
* "The Strange Case of Dr. Jekyll and Mr. Hyde" (1918)