Henry, O.,
--Cabbages and Kings, 1904.
--The Four Million, 1906.
--The Trimmed Lamp, 1907.
--The Voice of the City, 1908.
--Options, 1909.
--Roads of Destiny, 1909.
--Whirligigs, 1910.
--Strictly Business, 1910.
--The Best Short Stories of O. Henry, 1910.
--The Best of O. Henry, Courage, Philadelphia, Pennsylvania, 1978. ISBN: 1-56138-111-X
Stuart, David, O. Henry: A Biography of William Sydney Porter, Scarborough House, 1986, 1990.
Current-Garcia, Eugene, O. Henry's Technical Achievements, in The Best of O. Henry, Courage, Philadelphia, Pennsylvania, 1978. ISBN: 1-56138-111-X
Blansfield, Karen Charmaine, O. Henry, in The Best of O. Henry, Courage, Philadelphia, Pennsylvania, 1978. ISBN: 1-56138-111-X
