| Ruins | Rajith | Savanadas | 2016 | Literature |
| Ruins of Sri Lanka | Somapala | Jayawardhana | 1987 | General |
| Rulers of Sri Lanka, The | Vernon L. B., Dr | Mendis | 2000 | History |
| Running In The Family | Michael | Ondaatje | 1983 | General |
| Rural Change & Spatial Reorganization in Sri Lanka | Scandinavian Inst of Asian Studies | N/A | 1977 | General |
| Rural Development Intiatives - Helping The Rural Millions in Sri Lanka | Warnasena | Rasaputra | 1983 | General |
| Rural Poverty in Sri Lanka | Nandasena | Ratnapala | 1989 | General |
| Rural South Asia - Linkages, Change & Development | Peter | Robb | 1983 | General |
| Rural Theatre & Social Satire of Sri Lanka, The | M.H. | Goonatilleka | N/A | General |
| Rutherford's Planters' Note Book | N/A | Rutherford | 1931 | General |
| Ruthless Rhymes | Jay | Quill | 1951 | Literature |
| S. Thomas College Gurutalawa - OBA Members' Directory 15 Feb 2003 | N/A | N/A | 2003 | General |
| S. Thomas College Gurutalawa - OBA Members' Directory, 18 Aug 2007 | N/A | N/A | 2007 | General |
| S.J.V.Chelvanayakam & the Crisis of Sri Lankan Tamil Nationalism, 1947-1977 | A.Jeyaratnam | Wilson | 1994 | Politics |
| S.W.R.D.Bandaranaike - Prime Minister of Ceylon 1956-1959 | Tilak E. | Gooneratne | 1995 | Politics |
| SAARC - Origins, Organisation & Prospects | V.L.B. | Mendis | 1991 | General |
| Sabapathy Family of Manipay, The | Bubsy | Arulampalam | 2006 | General |
| Sacred City of Anuradhapura | N/A | N/A | 2014 | History |
| Sacred City of Anuradhapura, The | Brachmachari Walisinha | Harischandra | 1985 | Religion |
| Sacred City of Anuradhapura, The | W. | Harischandra | 1904 | History |
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