Works
Fiction
- Footprints On Sand (Advent:Publishers, Inc., 1981)
- Sprague de Camp's New Anthology of Science Fiction (Hamilton & Co. Ltd. London, 1954)
- Swords & Sorcery (Pyramid Books, 1963)
Historical Fiction
- An Elephant for Aristotle (Doubleday, 1958)
- The Arrows of Hercules (Doubleday, 1965)
- The Bronze God of Rhodes (Doubleday, 1993)
- The Dragon of the Ishtar Gate (Doubleday, 1961)
- The Golden Wind (Doubleday, 1969)
Non Fiction
- Ancient Ruins (Barnes & Noble, 1992)
- Citadels of Mystery (Fontana/Collins, 1972)
- Dark Valley Destiny (Bluejay Books, 1983)
- Darwin And His Great Discovery (Macmillan, 1972)
- Elephant (Pyramid Books, 1964)
- Energy and Power (Golden Press, 1962)
- Engines (Golden Press, 1959)
- Footprints On Sand (Advent, 1981)
- Great Cities Of The Ancient World (Dorset Press, 1990)
- Heroes of American Invention (Barnes & Noble, 1993)
- Inventions Patents and Their Management (Van Nostrand, 1959)
- Lands Beyond (Rinehart, 1952)
- Literary Swordsmen & Sorcerers (Arkham House, 1976)
- Lost Continents (Ballantine Books, 1975)
- Lovecraft: A Biography (Barnes & Noble, 1996)
- Man And Power (Golden Press, 1961)
- Rubber Dinosaurs And Wooden Elephants (Borgo Press, 1996)
- Science-Fiction Handbook, Revised (Owlswick Press, McGraw-Hill, 1975, 1977)
- Spirits, Stars and Spells the Profits and Perils of Magic (Canaveral Press, 1966)
- Teach Your Child To Manage Money (U.S. News & World Report Books, 1974)
- The Ancient Engineers (Doubleday, 1963)
- The Ape-Man Within (Prometheus, 1995)
- The Day Of The Dinosaur (Bonanza Books, 1985)
- The Evolution Of Naval Weapons (US Gov't Textbook, 1947)
- The Fringe Of The Unknown (Prometheus Books, 1983)
- The Great Monkey Trial (Doubleday, 1968)
- The Heroic Age of American Invention ((Doubleday, 1961))
- The Money Tree (New American Library, Inc., 1972)
- The Ragged Edge Of Science (Owlswick Press, 1988)
- The Story Of Science In America (Scribner, 1967)
- Three Thousand Years Of Fantasy And Science Fiction (Lothrop, Lee & Shaped Co., 1972)
- Time & Chance (Donald M. Grant, 1996)
- To Quebec and the Stars (Donald M. Grant, 1976)
Science Fiction
- A Gun for Dinosaur (Doubleday, 1963)
- A Planet Called Krishna (Compact Books, 1966)
- Blond Barbarians & Noble Savages ((T-K Graphics, 1975))
- Conan & The Spider God (Bantam, 1980)
- Cosmic Manhunt (Ace, 1954)
- Creatures of the Cosmos (Westminster)
- Divide and Rule (Fantasy Press, 1948)
- Genus Homo (Fantasy Press, 1950)
- Lest Darkness Fall (Baen, 1996)
- Rivers of Time (Baen, 1996)
- Rogue Queen (Doubleday, 1951)
- Scribblings (Nesfa Press, 1972)
- Sir Harold and The Gnome King (Wildside Press, 1991)
- Solomon's Stone (Avalon, 1957)
- Tales Beyond Time (Lothrop, Lee & Shepard, 1973)
- Tales From Gavagan's Bar (Owlswick Press, 1978)
- The Best Of De Camp (Ballantine Books, 1978)
- The Blade of Conan ((Ace, 1979))
- The Bones Of Zora (Ace, 1984)
- The Carnelian Cube (Gnome Press, 1948)
- The Castle Of Iron (Gnome Press, 1950)
- The Clocks Of Iraz (Pyramid, 1971)
- The Complete, Compleat Enchanter (Baen Books, 1987)
- The Conan Grimoire ((Mirage Press, 1972))
- The Conan Reader ((Mirage Press, 1968))
- The Conan Swordbook ((Mirage Press, 1969))
- The Continent Makers (Twayne, 1953)
- The Enchanter Compleated (Future Publications, 1953)
- The Enchanter Reborn (Baen, 1992)
- The Exotic Enchanter (Baen, 1995)
- The Fallible Fiend (Baen, 1973)
- The Fantastic Swordsman
- The Floating Continent (Richmond Hill Printing Works, 1962)
- The Glory That Was (Avalon, 1960)
- The Goblin Tower (Pyramid, 1968)
- The Great Fetish (Doubleday, 1978)
- The Hand of Zei (Baen, 1978)
- The Honorable Barbarian (Del Ray, 1989)
- The Hostage Of Zir (Berkeley & Putnam, 1978)
- The Incompleat Enchanter (Holt, 1941)
- The Incorporated Knight (Baen, 1987)
- The Intrepid Enchanter
- The Land Of Unreason (Holt, 1941)
- The Pixilated Peeress (Del Ray, 1991)
- The Prisoner Of Zhamanak (Phantasia Press, 1982)
- The Purple Pterodactyls (Ace, 1980)
- The Queen Of Zamba (Ace, 1954)
- The Reluctant King (Baen, 1996)
- The Reluctant Shaman (Pyramid, 1970)
- The Return of Conan ((Gnome Press, 1957))
- The Search for Zei (Avalon, 1962)
- The Spell of Conan ((Ace, 1980))
- The Spell of Seven (Pyramid, 1969)
- The Stones Of Nomuru (Donning, 1988)
- The Swords of Zinjaban (Baen, 1991)
- The Tower Of Zanid (Bouregy, 1958)
- The Tritonian Ring (Del Ray, 1953)
- The Unbeheaded King (Ballantine, 1983)
- The Undesired Princess (Baen, 1980)
- The Venom Trees Of Sunga (Del Ray, 1992)
- The Virgin and The Wheels (Popular Library Edition, 1976)
- The Virgin of Zesh and the Tower of Zanid (Ace, 1983)
- The Wheels Of If (Shasta, 1948)
- Wall Of Serpents (Dell, 1979)
- Warlocks & Warriors (Putnam, 1970)
Speech
- Asimov on de Camp
- Author's Afterword
- Preamble
- Speech in Acceptance of the Pilgrim Award 1998 (1998)
Verse
- A Skald's Lament
- A Song for Tomorrow
- Demons and Dinosaurs (Arkham House, 1970)
- Heroes and Hobgoblins (Donald M. Grant, 1981)
- Little Green Men
- Love Song
- New Year's Eve in Baghdad
- Phantoms and Fancies (Mirage Press, 1972)
- Questions for an Author
- The Hippopotamus
- The Jungle Vine
- Warriors