| Writing an Inheritance - Women's Writing in Sri Lanka 1860 - 1948, Vol 1 | Neloufer | de Mel | 2002 | Literature |
| Writing That Conquers - Re-reading Knox's An Historical Relation of the Island Ceylon | Sarojini | Jayawickrama | 2004 | General |
| Writings & Musings | Thiru | Arumugam | 2016 | Literature |
| Writings of Sri Kathiresu Ramachandra, 1895 - 1976 | Ramachandra | Balasuperamaniam | 2017 | General |
| Written in the Stars | Nalini | de Sielvie | 2021 | Literature |
| WTO, Globalization & Eppawala after Seattle | D. L. O. | Mendis | 2000 | General |
| Xavier As Educator | W.L.A., Rev Fr | Don Peter | 1974 | Religion |
| Yaal Players, The - Memories of Old Jaffna | Vimala | Ganeshananthan | 2013 | General |
| Yakada Yaka | Carl | Muller | 1994 | Literature |
| Yaksas - Part 1 & Part 2 | Ananda K. | Coomaraswamy | 1971 | General |
| Yala National Park - Guide to the (Ruhuna) | Fauna International Trust | N/A | 1993 | General |
| Yala Wildlife Reserves, The - Biodiversity & Ecology | Mangala | de Silva | 2004 | General |
| Yana Maga, Sri Lanka - a gift for all | Elmo | Jayawardena | 2012 | General |
| Yantra Drawings on Palm Leaf - Sri Lanka | L. S. D. | Pieris | 2017 | General |
| Yapahuwa | W.B.Marcus | Fernando | 1969 | History |
| Yarns of Ceylon | W. J. | Noble | 1930 | General |
| Yesterday Is Another Country | Somasiri | Devendra | 2008 | Literature |
| Young Lanka Must ! | Francis O., Rev. Fr | Tambimuttu | 1941 | Religion |
| Young Socialist - No 2 | Sydney | Wanasinghe | 1980 | General |
| Your Childrens' Islam | H.M. Khalid | Siddiqi | 1984 | Religion |
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