O'Brien, Edwar J. The Best Short Stories of 1915. Boston: Small, Maynard, 1917. (49D-1321)

O'Brien, Edward Joseph. Fifty Best American Short Stories, 1915-1939. Boston: Houghton Mifflin Company, 1939. (58D-270)

O'Connor, Harvey. Mellon's Millions. New York: John Day, 1933. Inscribed by author. (49D-1322)

O'Donovan, Gerald. Vocations. New York: Boni and Liveright, 1922. (49D-1325)

O'Flaherty, Liam. The Black Soul. New York: Boni and Liveright, n.d. (49D-1327)

O'Leary, Con. This Delicate Creature. London: Constable, 1928. (49D-1329)

O'Neill, Eugene G. American Dream. New York: Samuel French, 1933. (49D-1349)

O'Neill, Eugene G. Anna Christie. New York: H. Liveright, 1930. 17 of 750 signed limited edition. (49D-1332)

O'Neill, Eugene G. Beyond the Horizon. New York: Boni and Liveright, 1923. (49D-1333)

O'Neill, Eugene G. Dynamo. New York: H. Liveright, 1929. Number 10 of 775 copies signed by author. (49D-1337)

O'Neill, Eugene G. The Emperor Jones, Diff'rent, The Straw. New York: Boni and Liveright, 1923. (49D-1339)

O'Neill, Eugene G. The Great God Brown; The Fountain; The Moon of the Caribbees, and Other Plays. New York: Boni and Liveright, 1926. (49D-1340)

O'Neill, Eugene G. The Hairy Ape. New York: H. Liveright, 1929. Limited edition, number 15 of 775 copies that are signed by the author. (49D-1341)

O'Neill, Eugene G. The Hairy Ape; Anna Christie; The First Man. New York: Boni and Liveright, 1923. (49D-1342)

O'Neill, Eugene G. Lazarus Laughed (1925-1926): A Play for an Imaginative Theatre. New York: Boni and Liveright, 1927. (58D-272)

O'Neill, Eugene G. The Moon of the Caribbees, and Six Other Plays of the Sea. New York, 1921. (49D-1343)

O'Neill, Eugene G. The Moon of the Caribbees, and Six Other Plays of the Sea. New York, 1921. (49D-1343)

O'Neill, Eugene G. Mourning Becomes Electra. New York: H. Liveright, 1931. (49D-1344)

O'Neill, Eugene G. Mourning Becomes Electra. New York: H. Liveright, 1931. Limited edition. Number 533 of 550 autographed copies. (49D-1345)

O'Neill, Eugene G. Plays: Anna Christie, All God's Chillun Got Wings, Diff'rent. New York: Boni and Liveright, 1925. (49D-1334)

O'Neill, Eugene G. Plays: Beyond the Horizon, The Straw, Before Breakfast. New York: Boni and Liveright, 1925. (49D-1335)

O'Neill, Eugene G. Plays: Desire Under the Elms, The Hairy Ape, Welded. New York: Boni and Liveright, 1925. (49D-1336)

O'Neill, Eugene G. Plays: The Emperor Jones, Bold, The First Man, The Dreamy Kid. New York: Boni and Liveright, 1925. (49D-1338)

O'Neill, Eugene G. Strange Interlude. (Dummy copy). (49D-1348)

O'Neill, Eugene G. Strange Interlude. New York: Boni and Liveright, 1928. (49D-1347)

O'Neill, Eugene G. Strange Interlude. New York: Boni and Liveright, 1928. Number 5 of 775 autographed copies. (49D-1346)

Onions, Oliver. In Accordance with the Evidence. New York: George H. Doran, 1913. (49D-1361)

Onions, Oliver. The Debit Account. New York: George H. Doran, 1913. (49D-1350)

Onions, Oliver. Mushroom Town. New York: George H. Doran, 1914. (49D-1352)

Onions, Oliver. The Story of Louie. New York: George H. Doran, 1913. (49D-1353)

O'Sheel, Shaemas. It Never Could Happen or The Second American Revolution. New York: Coventry House, 1930. (49D-1355)

O'Sheel, Shaemas. Sophokles, Antigone: A New Redaction in the American Language. Brooklyn: n.p., 1931. 499 copies published privately. Inscribed to Dreiser by the author. (49D-1356)

Odets, Clifford. Awake and Sing. New York: Random House, 1935. (49D-1323)

Odets, Clifford. Paradise Lost. New York: Random House, 1936. (49D-1324)

Odum, Howard W. Rainbow Round My Shoulder. Indianapolis: BM, 1928. (49D-1326)

Oldfield, Claude H. I Am Jonathan Scrivener. New York: Simon and Schuster, 1930. (49D-1328)

Oliphant, Margaret O. The Makers of Venice. Philadelphia: H. T. Coates, n.d. (49D-1330)

Olyanova, Nadya. What Does Your Handwriting Reveal? New York: Grosset and Dunlap, 1929. Inscribed to Dreiser by the author. (49D-1331)

Oppenheim, James. The Mystic Warrior. New York: A. A. Knopf, 1921. Number 258 of 535. (49D-1354)

Ornitz, Samuel Badisch. Haunch, Paunch, and Jowl: An Anonymous Autobiography. New York: Boni and Liveright, 1923. (58D-273)

Orton, Vrest. Dreiserana: Book about His Books. New York: Chocorua Bibliographies, 1929. Inscribed to Dreiser from the author. (58D-53)

Ostenso, Martha. Prologue to Leve. New York: Dodd, Mead, 1932. (49D-1357)

Ostenso, Martha. The Waters Under the Earth. New York: Dodd, Mead, 1930. (49D-1358)

Osterhout, Winthrop J. The Nature of Life. New York: Henry Holt, 1924. Inscribed to Dreiser by the author. (49D-1359)

Oursler, Fulton. Sandalwood. New York: Macaulay, 1925. Inscribed to Dreiser by the author. (49D-1360)