| Wetland Site Report - Bellanwilla-Atidiya Marsh | Central Environment Authority | N/A | 1993 | General |
| Wetland Site Report - Walauwawatta Waturana Swamp Forest | Central Environment Authority | N/A | 1994 | General |
| Whales & Dolphins, Sri Lanka | Anouk | Ilangakoon | 2002 | General |
| What Anglo-Catholics Stand For - Five Lectures | N/A | N/A | 1927 | Religion |
| What I Think | J. | Vijayatunga | 1948 | General |
| What Is Buddhism | P.Lakshmi, Prof | Narasu | 1964 | Religion |
| What Is Catholic Action ? | Christian | John | N/A | Religion |
| What Is The Position of the Church of England | Chrtistopher.E., Rev Fr | Bonjean | 1926 | Religion |
| What People Think About the Ethnic Conflict | N/A | N/A | 2000 | General |
| What Tree is That? A Lay-Persons Guide to Some Trees of Sri Lanka | Sriyanie | Miththapala | 1998 | General |
| When Guns Fall Silent | Punyakante | Wijenaike | 2010 | Literature |
| When Memory Dies | A. | Sivanandan | 1997 | Literature |
| Where Angels Fear to Tread | S. L | Gunasekara | 2009 | General |
| Where No Woman Travels Alone | Lakmali | Gunawardena | 1993 | Literature |
| Where Serfdom Thrives - The Plantation Tamils of Sri Lanka | Mayan | Vije | 1987 | General |
| Where Seven Blooms Were Nurtured | Norberta, Rev. Sr | Wickramaratne | N/A | General |
| Where The Buddha Trod | R, Major | Raven-Hart | 1966 | Religion |
| Where The White Sambhur Roams | Richard L. | Spittel | 1951 | Literature |
| While Government Talks Peace.... Terrorism Continues | Dept of Information | N/A | 1984 | General |
| White Lotus, The - The Personality of the Buddha | S.R. | Wijayatilake | 1970 | Religion |
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