| Suicide Club, The | Herman | Gunaratne | 2010 | General |
| Suicide in Sri Lanka | Padmasiri | De Silva | 1989 | General |
| Sullen Hills, The | Roderic | Grigson | 2018 | Literature |
| Sultan's Kitchen - Recipes From India, Pakistan, Burma & Ceylon | Doris M | Ady | 1968 | General |
| Sun at my Back, The | Clare | Senewiratne | 1983 | General |
| Sunil Santha, The Man who invented Sinhala Music for a Modern Age | Tony, Dr | Donaldson | 2016 | General |
| Sunset in a Valley - Kotmale, Record of a Lost Culture & Civilization | Anuradha | Seneviratna | 2001 | General |
| Sunset Years | Punyakante | Wijenaike | 2004 | Literature |
| Supplement to the Sapumal Foundation Collection | de Soysa | Rohan | 2017 | General |
| Supreme Court of Sri Lanka, The - The First 185 Years | A.R.B. | Amerasinghe | 1986 | General |
| Surgeon of the Wilderness - Biography of Dr R.L.Spittel | Christine | Spittel Wilson | 2001 | General |
| Surrender or Betrayal - Sri Lanka Gives up Last King | D. B. | Kuruppu | 2003 | History |
| Survey of Environmental Legislation & Institutions in the SACEP Countries - Sri Lanka | K.H.J. | Wijayadasa | 1986 | General |
| Survey of Irrigation in Eight Asian Nations | William R. | Gasser | 1981 | General |
| Survey of Sinhala Literature, A | James, Hon | de Alwis | 1966 | Literature |
| Survey on Cost of Production of Paddy | Central Bank of Ceylon | N/A | 1969 | General |
| Survey Report on the Prevalence of illicit Small Arms in Sri Lanka | Ministry of Defence | N/A | 2008 | General |
| Surveying & Mapping in Colonial Sri Lanka | Ian J. | Barrow | 2008 | General |
| Survival & Development - Buddhist Perspective | Jotiya | Dhirasekera | 1982 | Religion |
| Sweet & Simple Kind, The | Yasmine | Gooneratne | 2006 | Literature |
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