| Let's Give Therm Curry - An Austral-Asian Comedy in Three Acts | Ernest | Macintyre | 1981 | General |
| Let's Go Somewhere | Carmini | Sinnetamby | 1979 | General |
| Letchimey - A Tale of Old Ceylon | Sinnatamby | N/A | 1898 | General |
| Lets Learn Sinhala - Vol 1, Vowels & Consonants | J. B. | Disanayaka | 2003 | General |
| Lets look At Our Birds - A Child's Introduction to Bird Watching | Sita | De Saram | 2001 | General |
| Lets Read & Write Sinhala | J.B. | Dissanayake | 1993 | General |
| Letters on Ceylon Particularly Relative to the Kingdom of Kandy | L., Capt | De Bussche | 1999 | History |
| Letters To Ceylon 1814-1824 - Being Correspondence Addressed to Sir John D'Oyly | P.E. | Pieris | 1938 | History |
| Let\'s Learn Sinhala - Vol 2, Vowels & Strokes | J. B. | Disanayaka | 2003 | General |
| Liberation of the Living Faiths of Asia - Quest 54 | Michael, Rev Fr | Rodrigo | 1979 | Religion |
| Liberation Theology On Trial - Logos - Vol 23, No 4, 1984 | Centre For Society & Religion | N/A | 1984 | Religion |
| Libraries & People - Colombo Public Library 1925-1975 | Ishvari | Corea | 1975 | General |
| Library Services for Ceylon | Harold V. | Bonny | N/A | General |
| Libyan Episode, The - A Romance of the Tea Trade | Wilfrid | Jayasuriya | 1996 | Literature |
| Lifco English-Tamil Dictionary | N/A | N/A | 1981 | General |
| Life & Times of D.R.Wijewardene, The | H.A.J. | Hulugalle | 1966 | General |
| Life & Times of the Buddha, The | Enzo | Orlandi | 1968 | Religion |
| Life Cycle Rituals Among the Sinhalese | Deema | de Silva | 2002 | General |
| Life In All Its Quirkiness, Short Stories | Christine | Hand | 2022 | Literature |
| Life In Ancient India | C., Mrs | Speir | 1856 | General |
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