| Tradition Adapts to Modernity, a Personal Narrative | Nanda Pethiyagoda | Wanasundera | 2018 | General |
| Traditional Art Of Woodcarving, The | N/A | N/A | 1984 | General |
| Traditional Dance of Sri Lanka | Anuradha | Seneviratna | 1984 | General |
| Traditional Forms of Packaging and Vending | Doreen | Alles | 1982 | General |
| Traditional Homelands of The Tamils, The - 1 | A.R. | Arudpragasam | 1996 | General |
| Traditional Practices in Sri Lanka, Agriculture, Animal Husbandry, Irrigation, Marine Fisheries, Inland Fisheries) | W. I. | Siriweera | 2016 | General |
| Traditional Sri Lankan Food | T.Publis | Silva | 1994 | General |
| Traditions of Sri Lanka | C.G. | Uragoda | 2000 | General |
| Traffic Signs, Road Marking and Traffic Signals | T. | Perinpanayagam | 2012 | General |
| Tragedy of a Mystery, The | Rosalind | Mendia | 1986 | Literature |
| Tragedy of Errors, A - About Tigers, Talks, Ceasefires & The Proposed Constitution | S.L. | Gunasekera | N/A | General |
| Train Guide 1981 | Sri Lanka Railways | N/A | 1981 | General |
| Train No 50 - Tsunami Disaster | Pradeep | Gunawardana | 2006 | General |
| Tranquil Footsteps | Srilal | Miththapala | 2008 | General |
| Transactions For 1953 - Part 1, Engineering Association of Ceylon | Engineering Association of Ceylon | N/A | 1953 | General |
| Transformation of Vision Into Reality-Planning for Development (Awakening) | A.T. | Ariyaratne | 1990 | General |
| Transformed Port of Colombo, The | Douglas B. | Ranasinghe | 2006 | General |
| Transforming A 'White Australia' | Laksiri (Prof) | Jayasuriya | 2012 | General |
| Translation of Hansa-Sandesa (1-62) | J. | de Silva | 1926 | General |
| Transmigration and Metempsychosis | Chas | de Livera | N/A | Religion |
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