| 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 |
| Man-Eating Leopard of Punanai, Sri Lanka, The | Douglas B | Ranasinghe | 2009 | General |
| Management Techniques in the Tea Plantation Industry - Seminar Papers | Institute of Chartered Accountans of Ceylon | N/A | 1971 | General |
| Managing Ethnic Tensions in Multi-Ethnic Societies, Sri Lanka 1880-1985 | K.M. | de Silva | 1986 | General |
| Maname & Other Stories | A.M.G. | Sirimane | 1977 | Literature |
| Mandalarama (Vattarama) & Alokalena (Alulena) | G. R. | Gunawardana Banda | 2017 | Religion |
| Mangroves of Sri Lanka | Leonard | Pinto | 1986 | General |
| Mannar Unbound | Thilak | Jayaratne | 2018 | General |
| Mannar, Sri Lnka | Sarala | Fernando | 2017 | General |
| Mannar, A Monograph | W. J. S. | Boake | 1888 | General |
| Manners, Customs & Ceremonies of Sri Lanka | Miniwan P. | Tillakaratne | 1986 | General |
| Manning Coconut Trial Ground - Report | N/A | N/a | 1918 | General |
| Manpower & Economic Development in Ceylon | S. | Selvaratnam | 1969 | General |
| Mansions of the Moon | Shyam | Selvadurai | 2022 | General |
| Manual of a Mystic - F. L. Woodward, a Buddhist Scholar in Ceylon & Tasmania | Michael | Powell | 2001 | Religion |
| Manual of Buddhism, A | Narada | Thera | 1949 | Religion |
| Manual of Buddhist Historical Traditions, A (Saddhamma-Sangaha) | Bimala Churn | Law | 1841 (Reprint 1999) | Religion |
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