| Through The Covers | Channa | Gunasekara | 2008 | General |
| Through the Jungle Very Softly | Ludwig | Koch-Isenburg | 1963 | General |
| Through The Vistas of Life | V.S.M. | de Mel | 1977 | General |
| Thus We Became | S. | Rajanayagam | 1994 | General |
| Tic Polonga | Russ | Anderton | 1954 | General |
| Tide Press of a Dedicated Life, The - A Tribute to Christine Spittel Wilson | Carl | Muller | 2005 | General |
| Tiger Country | Kate | Nivison | 1998 | Literature |
| Tiger Spiders \"Poecilotheria\" of Sri Lanka | Ranil | Nanayakkara | 2014 | General |
| Tiger Vanquished, The - LTTE's Story | M. R. Narayan | Swamy | 2010 | General |
| Tigerism and Other Essays | Ram | Manikkalingam | 1995 | General |
| Tigers of Lanka - From Boys To Guerrillas | M.R.Narayan | Swamy | 1995 | General |
| Tigers, Moderates & Pandora's Package | S.L. | Gunasekera | 1996 | General |
| Tigress of Kilinochchi, A | Lucky | de Chickera | 2010 | Literature |
| Till the Mountains Disappear, The History of St Joseph\'s College | Avishka Mario | Senewiratne | 2020 | General |
| Time & Chance | Siri | Ranawake | 2005 | General |
| Time For Action - Selected Speeches of Hon.R. Premadasa | Christy | Cooray | 1980 | Politics |
| Time Table - Sri Lanka Railways, September 1983 | Sri Lanka Railways | N/A | 1983 | General |
| Time Table 1991 | Sri Lanka Railways | N/A | 1991 | General |
| Timeless Tales From Long Ago, Stories retold from the Mahawamsa & Chulawamsa | Maureen | Seneviratne | 2005 | Religion |
| Times of Ceylon Annual 1954 | Tori | De Souza | 1954 | General |
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