| Those Long Afternoons | E.F.C. | Ludowyk | 1989 | General |
| Those Were the Days | P. G. | Punchihewa | 2016 | General |
| Those Were The Days | P.G. | Punchihewa | 2007 | General |
| Three Dispositions Towards The Past: One Sinhala, Two Tamil | E.Valentine | Daniel | 1992 | General |
| Three Essays on a Sri Lanka Household Survey | Angus | Deaton | 1981 | General |
| Three Generation Tale, A | Srini | Peries | 2012 | Literature |
| Three Prime Ministers of Ceylon - An Inside Story | J.L. | Fernando | 1963 | Politics |
| Three Score and Ten - Royal vs St Thomas' Cricket Encounters | S.P. | Foenander | 1949 | General |
| Three Women | Chitra | Fernando | 1983 | Literature |
| 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 |
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