Authors: R. (sorted by quantity of books)
- Adams, James R. - 6 books
- Gilbert, Robert E. 1924-1993 6 books
- Sheridan, Richard Brinsley 1751-1816 6 books
- Tawney, R. H. (Richard Henry) 1880-1962 5 books
- Davey, Richard 1848-1915 5 books
- Maturin, Charles Robert 1780-1824 5 books
- Biggs, Charlotte -1827 5 books
- Montgomery, Rutherford G. (Rutherford George) 1896-1985 5 books
- Raspe, Rudolf Erich 1737-1794 5 books
- Haldane, R. B. Haldane (Richard Burdon Haldane), Viscount 1856-1928 5 books
- Pritchett, R. T. (Robert Taylor) 1828-1907 5 books
- Busk, Rachel Harriette 1831-1907 5 books
- Green, Alice Stopford 1848-1929 5 books
- Auguis, P. R. (Pierre René) 1786-1846 5 books
- Wylie, I. A. R. (Ida Alexa Ross) 1885-1959 5 books
- Mellin, Robert 1826-1880 5 books
- Schaare, C. R. (Christian Richard) 1893-1980 5 books
- Baxter, Richard 1615-1691 5 books
- Davis, Rebecca Harding 1831-1910 5 books
- Morris, Richard 1833-1894 5 books
- Church, R. W. (Richard William) 1815-1890 5 books
- Rait, Robert S. (Robert Sangster) 1874-1936 5 books
- Hertzberg, Rafaël 1845-1896 5 books
- Mead, G. R. S. (George Robert Stow) 1863-1933 4 books
- Barnes, Robert 1840-1895 4 books