The Lovecraft Stories
- The Alchemist (1908)
- Ashes (with C. M. Eddy, Jr.; 1923)
- At the Mountains of Madness (February-22 March 1931)
- Azathoth (June 1922)
- The Battle that Ended the Century (with R. H. Barlow;
June 1934)
- The Beast in the Cave (21 April 1905)
- Beyond the Wall of Sleep (1919)
- The Book (late 1933?)
- The Call of Cthulhu (Summer 1926)
- The Case of Charles Dexter Ward (January-1 March 1927)
- The Cats of Ulthar (15 June 1920)
- Celephaïs (early November 1920)
- The Challenge from Beyond (with C. L. Moore; A. Merritt;
Robert E. Howard, and Frank Belknap Long; August 1935)
- Collapsing Cosmoses (with R. H. Barlow; June 1935)
- The Colour Out of Space (March 1927)
- Cool Air (March 1926)
- The Crawling Chaos (with Winifred V. Jackson; 1920/21)
- The Curse of Yig (with Zealia Bishop; 1928)
- Dagon (July 1917)
- Deaf, Dumb, and Blind (with C. M. Eddy, Jr.; 1924?)
- The Descendant (1926?)
- The Diary of Alonzo Typer (with William Lumley; October
1935)
- The Disinterment (with Duane W. Rimel; September 1935)
- The Doom That Came to Sarnath (3 December 1919)
- The Dream-Quest of Unknown Kadath (Autumn? 1926-22
January 1927)
- The Dreams in the Witch House (January-28 February 1932)
- The Dunwich Horror (Summer 1928)
- The Electric Executioner (with Adolphe de Castro; 1929?)
- The Evil Clergyman (October 1933)
- Ex Oblivione (1920/21)
- Facts Concerning the Late Arthur Jermyn and His Family (1920)
- The Festival (October 1923)
- From Beyond (16 November 1920)
- The Ghost-Eater (with C. M. Eddy, Jr.; 1923)
- The Green Meadow (with Winifred V. Jackson; 1918/19)
- The Haunted House (1898/1902; nonextant)
- The Haunter of the Dark (November 1935)
- He (11 August 1925)
- Herbert West--Reanimator (September 1921-mid 1922)
- History of the Necronomicon (1927)
- The Horror at Martin's Beach (with Sonia H. Greene; June
1922)
- The Horror at Red Hook (1-2 August 1925)
- The Horror in the Burying-Ground (with Hazel Heald; 1933/35)
- The Horror in the Museum (with Hazel Heald; October 1932)
- The Hound (September 1922)
- Hypnos (March 1922)
- Ibid (1928?)
- In the Vault (18 September 1925)
- In the Walls of Eryx (with Kenneth Sterling; January 1936)
- John, the Detective (1898/1902; nonextant)
- The Last Test (with Adolphe de Castro; 1927)
- Life and Death (1920?; lost)
- The Little Glass Bottle (1897)
- The Loved Dead (with C. M. Eddy, Jr.; 1923)
- The Lurking Fear (November 1922)
- The Man of Stone (with Hazel Heald; 1932)
- Medusa's Coil (with Zealia Bishop; May 1930)
- Memory (1919)
- The Moon-Bog (March 1921)
- The Mound (with Zealia Bishop; December 1929-early 1930)
- The Music of Erich Zann (December 1921)
- The Mysterious Ship (1902)
- The Mystery of the Grave-Yard (1898)
- The Mystery of Murdon Grange (1918; nonextant)
- The Nameless City (January 1921)
- The Night Ocean (with R. H. Barlow; Autumn? 1936)
- The Noble Eavesdropper (1897?; nonextant)
- Nyarlathotep (early December 1920)
- Old Bugs (1919)
- The Other Gods (14 August 1921)
- Out of the Aeons (with Hazel Heald; 1933)
- The Outsider (1921)
- Pickman's Model (1926)
- The Picture (1907; nonextant)
- The Picture in the House (12 December 1920)
- Poetry and the Gods (with Anna Helen Crofts; 1920)
- Polaris (May? 1918)
- The Quest of Iranon (28 February 1921)
- The Rats in the Walls (August-September 1923)
- A Reminiscence of Dr. Samuel Johnson (1917)
- The Secret of the Grave (1898/1902; nonextant)
- The Secret Cave or John Lees Adventure (1898)
- The Shadow Out of Time (November 1934-March 1935)
- The Shadow Over Innsmouth (November?-3 December 1931)
- The Shunned House (16-19 October 1924)
- The Silver Key (1926)
- The Statement of Randolph Carter (December 1919)
- The Strange High House in the Mist (9 November 1926)
- The Street (1920?)
- Sweet Ermengarde (1917)
- The Temple (1920)
- The Terrible Old Man (28 January 1920)
- The Thing on the Doorstep (21-24 August 1933)
- Through the Gates of the Silver Key (with E. Hoffmann
Price; October 1932-April 1933)
- Till 'A the Seas (with R. H. Barlow; January 1935)
- The Tomb (June 1917)
- The Transition of Juan Romero(16 September 1919)
- The Trap (with Henry S. Whitehead; late 1931)
- The Tree (1920)
- The Tree On The Hill (with Duane W. Rimel; May 1934)
- Two Black Bottles (with Wilfred Blanch Talman; July-October
1926)
- Under The Pyramids (with Harry Houdini; February-March
1924)
- The Unnamable(September 1923)
- The Very Old Folk (2 November 1927)
- What the Moon Brings (5 June 1922)
- The Whisperer In The Darkness (24 February-26 September
1930)
- The White Ship(November 1919)
- Winged Death (with Hazel Heald; 1933)
Spurious Works
- The Thing in the Moonlight