| Water Resources of Ceylon | S. | Arumugam | 1969 | General |
| Water Resources of Sri Lanka | Palitha | Manchanayake | 1999 | General |
| Waterfalls of Sri Lanka - Dancing Waters | Mervyn | Fernando | 1999 | General |
| Wave | Sonali | Deraniyagala | 2013 | Literature |
| Way of Life, A | Punyakante | Wijenaike | 1987 | Literature |
| Way Out Of Poverty - A Third World Perspective | R.W. | Crossette-Thambiah | 1981 | General |
| Way To Peace & Happiness, The | Yogavacara | Rahula Bhikku | N/A | Religion |
| Way We Grew, The | D. T. | Devendra | 2001 | General |
| We Were Making History, Saga of the Hartal of August 1953 | Wesley S. | Muthiah | 2002 | Politics |
| Wealth Behind Poverty - Report on Poverty Alleviation | N/A | N/A | 1992 | General |
| Wealth. Power and Prestige | S.T. | Hettige | 1984 | General |
| Wedded to Asia, The Wanderings of a French-Sri Lankan Family | Helene | Honnorat | 2011 | General |
| Wedding Gifts & Other Presents | Asitha | Ameresekere | 2008 | Literature |
| Wedding Night Stories | Carl | Muller | 2007 | Literature |
| Wedding Season, The | Su | Dharmapala | 2012 | Literature |
| Wednesday's Children - Sexually Exploited Children | Maureen | Seneviratne | N/A | General |
| Weerasinghe Land & Other Non Fictional Stories | E. R. | Jansz | 2021 | General |
| Welcome To Galle | Norah | Roberts | N/A | General |
| Welfare and Growth in Sri Lanka | Marga Institute | N/A | 1974 | General |
| Welfare As Politics in Sri Lanka | W.A. | Wiswa Warnapala | 1987 | General |
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