| Names & Numbers, Stories | Chiranthi | Rajapakse | 2017 | Literature |
| Nandhimitta | Rosalnd | Mendis | 1952 | Literature |
| Narcotics & Drugs in Sri Lanka, Sociological Dimensions | D.C. | Jayasuriya | 1986 | General |
| Narcotics and Drug Use Problems - Colombo Plan Meeting | Colombo Plan Bureau | N/A | 1974 | General |
| Narrating Tamil Nationalism Subjectivities & Issues | Michael | Roberts | 2005 | General |
| Narrative of Events which Have Recently Occured in the Island of Ceylon, A | Gentleman On The Spot | N/A | 1937 | History |
| Narrow Escape | S. | Bevilapitiya | N/A | Literature |
| Narrow Gauge Railways of Ceylon | Rasika | Wickramanayaka | 2021 | General |
| Natarajah - A Poem for Mr T.S.Eliot's Sixtieth Birthday | Tambimuttu | N/A | 1948 | Literature |
| National Arms & Badges of Ceylon, Ceremonial & Other Uniforms (Sessional Paper, 1953) | R.S.V. | Poulier | 1953 | General |
| National Atlas of Sri Lanka, The | Survey Dept | N/A | 1988 | General |
| National Education - Its Concept and Content | N. | Sabaratnam | 1961 | General |
| National Languages of Sri Lanka - 1, Sinhala | J.B. | Disanayaka | N/A | General |
| National Languages of Sri Lanka 2 - Tamil | K. | Kailasapathy | 1976 | General |
| National Parks & Reserves - Sri Lanka | Gehan | de Silva Wijeyeratne | 2005 | General |
| National Parks In Sri Lanka | N/A | N/A | N/A | General |
| National Parks of Ceylon, A Guide | Lyn | de Alwis | 1969 | General |
| National Planning Council, Report of Committees | N/A | N/A | 1959 | General |
| National Symbols of Sri Lanka | K. D. G, Dr | Wimalaratne | 2006 | General |
| National Symposium on Elephant Management & Conservation | Jayantha | Jayewardene | 1998 | General |
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