- Gay Wilson Allen, Walt Whitman Handbook
- Chicago, Packard and Co., 1946
- William Eleazar Barton, Abe Lincoln and Walt Whitman
- Port Washington, Long Island, N.Y., Kennikat Press, 1965
- Roger Asselineau, The Evolution of Walt Whitman
- Cambridge, Harvard University Press, 1960
- Henry Augustin Beers, Four Americans: Roosevelt, Hawthorne, Emerson and Whitman
- Freeport, Long Island, N.Y., Books For Libraries Press, 1968
- Richard Maurice Bucke, Cosmic Consciousness
- New York, E.P.Dutton, 1991
- John Burroughs, Notes on Walt Whitman, as Poet and Person
- New York, Haskell House, 1971
- David Cavitch, "My Soul And I" The Inner Life of Walt Whitman
- New York, Beacon Press, 1985
- Byron R. S. Fone, Masculine Landscapes: Walt Whitman and the Homoerotic Text
- Carbondale, Illinois: Southern Illinois University Press, 1992
- suggested by E.J.Garcia, Chicago, Ill.
- Justin Kaplan, Walt Whitman, A Life
- New York, Simon & Shuster, 1980
- Catherine Reef, Walt Whitman
- New York, Clarion Press, 1995
- David S. Reynolds, Walt Whitman's America: A Cultural Biography
- New York, Knopf, 1995
- James Thomson, Walt Whitman: The Man and The Poet
- New York, Haskell House, 1971 (Reprint of 1910 edition
- Paul Zweig, Walt Whitman: The Making of the Poet
- New York, Basic Books, 1984
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