| Aloysian, The - 1915-1990 | St Aloysius College OBA | N/A | 1990 | General |
| Alphabetical Index to the Registers of Marriage at the Dutch Reformed Church at Wolvendaal Colombo 1709 - 1936AD | S. A. W | Mottau | 2012 | General |
| Alternate Space: Trivial Writings of an Academic | Sasanka | Perera | 2005 | General |
| Amazing Grace, Memoirs of Tara Bolling | N/A | N/A | 2012 | Literature |
| Amba Yahaluwo | T. B. | Illangaratne | 2000 | Literature |
| Ambalangoda Mask Museum, The | Wolfgang | Mey | 1987 | General |
| American Mission Society Seminary (1823-1855) & Modern Education in Jaffna | S., Bishop Dr | Jebanesan | 2002 | General |
| Among My Souvenirs | Kirthie | Abeyesekera | 1990 | General |
| Among My Souvenirs | Regi | Siriwardena | 1997 | Literature |
| Among Those Present | D.B. | Dhanapala | 1962 | General |
| Amphibia of Ceylon, The | P. | Kirtisinghe | 1957 | General |
| Amphibian Fauna of Sri Lanka, The | Sushil K | Dutta | 1996 | General |
| Amphibians of Sri Lanka: A Photographic Guide to Common Frogs, Toads & Caecilians | Anslem | de Silva | 2009 | General |
| Amulet | Punyakante | Wijenaike | 1994 | Literature |
| An ABC of Planting | A. R. | Cathcart | N/A | General |
| An Account of the Island of Ceylon 1803 | Robert | Percival | 1975 | History |
| An Analysis of the Pre-Mahaweli Situation in H4 & H5 Areas in Kala-Oya Basin | Agrarian Research &Training Institute | N/A | 1979 | General |
| An Anthology of Ceylon Poetry | Andrew G. | De Silva | 1955 | Literature |
| An Anthology of Contemporary Sri Lankan Poetry in English | Rajiva | Wijesinha | 1988 | Literature |
| An Anthology of Indian Literature | John B. | Alphonso-Karkala | 1971 | Literature |
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