| Mahaweli Saga, Challenge & Response | Lucien | Rajakarunayake | 1985 | General |
| Mahaweli Water For Adjacent Basins | Ministry of Lands & Land Development | N/A | 1979 | General |
| Mahayana Monuments in Ceylon | Nandasena | Mudiyanse | 1967 | History |
| Mahinda | Muthu | Padmakumara | 2010 | Politics |
| Maiden\'s Prayer, A, A Family Story Set in 1970s Sri Lanka | Srianthi | Perera | 2020 | Literature |
| Maithripala Senanayeke Felicitation Volume | N/A | N/A | 1972 | General |
| Major Irrigation Works of Sri Lanka | A. Denis N | Fernando | 1980 | General |
| Major Issues Arrising from the Transfer of Technology - Case Study, Sri Lanka | Unite Nations | N/A | 1975 | General |
| Making of A Historian, The | K. M. | de Siulva | 2017 | General |
| Malalasekera Commemmoration Volume | O.H. | De A.Wijesekera | 1976 | General |
| Malaria in Ceylon - A Pamphlet For Teachers | Lucius | Nicholls | 1920 | General |
| Malay Centenary Book - Cricket Club & All Ceylon Malay Association - Souvenir | D.D. | Saldin | 1972 | General |
| Malayan Symaster - Memoirs of a Rubber Planter, Bandit Fighter & Spy | Boris | Hembry | 2011 | General |
| Maldive Islands, The - Monograph on the History, Archaelogy and Epigraphy | H. C. P. | Bell | 2002 - Reprint | General |
| Maldive Mystery, The | Thor | Heyerdahl | 1986 | General |
| Malice Towards All & Charity Towards None - Voet Lights Society Centenary Dinner | N/A | N/A | 2009 | History |
| Mammals of Sri Lanka, The | Asoka | Yapa | 2013 | General |
| Man in Buddhism & Christianity | Bryan, Dr | De Kretser | 1998 | Religion |
| Man in His Time, A, The Jetwing Story and the life of Herbert Cooray | Shiromal | Cooray | 2018 | General |
| Man of the Masses - R. Premadasa, A Biography | Wimal | Abhayasundara | 1979 | Politics |
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