| Guide to Roads & Mawathas in Colombo, A | R., Mrs | Christie-David | 1967 | General |
| Guide to Sigiriya | D. T. | Devendra | 1951 | History |
| Guide to the Ancient Monuments of Anuradhapura | Jayanta | Uduwara | 1972 | History |
| Guide to the Biodiversity of Knuckles Forest Region, A - IUCN | C. N. B. | Bambaradeniya | 2003 | General |
| Guide to the Birds of Ceylon, A | G.M. | Henry | 1971 | General |
| Guide To The Botanic Gardens, Hakgala | J.J. | Nock | 1927 | General |
| Guide to the Colombo Museum - Part 2, Mineralogy | J.Spencer | Coates | 1924 | General |
| Guide To The Waterfalls of Sri Lanka, A | Eberhard | Kautzsch | 1983 | General |
| Guide to Urban Planting in Sri Lanka | D.T. | Ekanayake | N/A | General |
| Guide To Yapahuva | D.T. | Devendra | 1951 | History |
| Gunasena Cookery Book | Juliet | Fernando | 1970 | General |
| Gunasena English - Sinhalese Dictionary | Sirisena | Maitipe | 1977 | General |
| Guns, Taverns & Tea Shops, The Making of Modern ceylon | S.A. | Meegama | 2019 | General |
| Guru\'s Library, The | Nimal | Sanderatne | 2004 | Literature |
| H. W. Cave & Co. Colombo | J. G. | Winters | 2007 | General |
| Hambantota - "Inside The Salt Lagoons" | J.W. | Buultjens | N/A | General |
| Hambantota District, Sri Lanka, Integrated Rural Development Programme 1979-1985 | Michael York | Smith | 1986 | General |
| Hand Book of the Supreme Court of Ceylon, A | C. | Arasaratnam | 1929 | General |
| Hand-Book on Castes & Tribes Employed on Tea Estates in North India | N/A | N/A | 1924 | General |
| Handbook - Planters Association of Ceylon, 1854-1954 | The Planters' Assoiation of Ceylon | N/A | 1954 | General |
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