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- Osgood, Charles Grosvenor 1871-1964 11705 downloads
- Omar Khayyam 1048-1122 11404 downloads
- Lillibridge, Will 1878-1909 11361 downloads
- Okey, Thomas 1852-1935 11164 downloads
- Marden, Orison Swett 1848-1924 11132 downloads
- Opper, Frederick Burr 1857-1937 10389 downloads
- Stoddard, William O. 1835-1925 10355 downloads
- O'Brien, Charlotte Grace 1845-1909 10251 downloads
- Feuillet, Octave 1821-1890 10208 downloads
- Brownson, Orestes Augustus 1803-1876 9981 downloads
- Miller, John O. - 9859 downloads
- Oxley, J. Macdonald (James Macdonald) 1855-1907 9719 downloads
- Oeffinger, Rudolf 1870-1952 9717 downloads
- Harper, Olive 1842-1915 9575 downloads
- Overton, Grant M. (Grant Martin) 1887-1930 9499 downloads
- Eadie, Eleanor Osborn 1880-1956 9340 downloads
- Lodge, Oliver, Sir 1851-1940 9129 downloads
- Lyons, Oscar W. - 9079 downloads
- Orr, Monro S. 1874-1955 9008 downloads
- Onerva, L. 1882-1972 8960 downloads
- Oilliamson, Jeanne de Polignac, comtesse d' 1861-1919 8956 downloads
- Jahn, Otto 1813-1869 8701 downloads
- Ochoa, Enrique - 8528 downloads
- O'Neill, Eugene 1888-1953 8338 downloads
- Herzl, Theodor 1860-1904 8236 downloads