
The Immense Journey (1957)
Darwin’s Century: Evolution and the Men Who Discovered It (1958)
The Firmament of Time (1960)
The Mind as Nature (1962)
Man, Time, and Prophecy (1966) Limited edition.
The Unexpected Universe (1969)
The Brown Wasps: A Collection of Three Essays in Autobiography (1969)
The Invisible Pyramid: A Naturalist Analyses the Rocket Century (1971)
The Night Country: Reflections of a Bone-Hunting Man (1971)
The Man Who Saw Through Time (1973)
All The Strange Hours: The Excavation of a Life (1975)
The Star Thrower, Introduction by W. H. Auden (1978)
Darwin and the Mysterious Mr. X: New Light on the Evolutionists (1979)
The Lost Notebooks of Loren Eiseley, Kenneth Heuer editor (1987)
How Flowers Changed the World, with photographs by Gerald Ackerman (1996). Re-issue of essay from The Immense Journey.
Anthologies

The Loren Eiseley Reader, Introduction by Ray Bradbury (2009) Teaching guides available.
Loren Eiseley: Collected Essays on Evolution, Nature, and the Cosmos (boxed set in 2 volumes) – edited by William Cronon. Contains The Immense Journey, The Firmament of Time, The Unexpected Universe, The Invisible Pyramid, The Night Country, essays from The Star Thrower, and uncollected prose (2016) Library of America.
Poetry
Notes of an Alchemist (1972)
The Innocent Assassins (1973)
Another Kind of Autumn (1977)
All The Night Wings (1979)