| In The Line of Duty - Life & Times of a Surgeon in War & Peace | Gamini | Goonetilleke | 2008 | General |
| In the Pursuit of Governance | M. D. D. | Pieris | 2002 | General |
| In the Same Boat | Channa | Wickremesekera | 2010 | Literature |
| In the Shadow of a People\'s President | Evans Gunalal | Cooray | 2008 | Politics |
| In the Skin of a Lion | Michael | Ondaatje | 1997 | Literature |
| Incentives & Behaviour in the Ethnic Politics of Sri Lanka & Malaysia | Donald L. | Horowitz | 1993 | History |
| Incentives & Behaviour in the Ethnic Politics of Sri Lanka & Malaysia | Donald L. | Horowitz | 1993 | General |
| Income Tax, Wealth Tax & Gifts Tax in Sri Lanka | S. | Balaratnam | 1979 | General |
| Incomplete Thombu, The | T. | Shanaathanan | 2011 | General |
| Incursions & Excursions in and around Sri Lankan Cricket | Michael | Roberts | 2011 | General |
| Independence Day of Ceylon,The - Sessional Paper XXII - 1947 | Govt of Ceylon | N/A | 1947 | Politics |
| Independence Day Souvenir 1984 | Tilak | Ratnakara | 1984 | General |
| Independence Day Souvenir 1986 | Department of Information | N/A | 1986 | General |
| Index of The Ceylankan, Numbers 1 to 88, 1998-2019 | Chitra | Karunanayake | 2020 | General |
| Index to the Mahawansa together with Chronological Table of Wars & Genealogical Trees | John | Still | 1996 | Religion |
| India & Ceylon | Benimadhab | Barua | N/A | General |
| India & Ceylon - A Symposium | Philip | Mason | 1967 | General |
| India & Sri Lanka - Sirimavo-Shastri Pact | Lalit | Kumar | 1977 | Politics |
| India - Paintings From Ajanta Caves | UNESCO | N/A | 1954 | General |
| India House Colombo - Portrait of a Residence | Gopalakrishna | Gandhi | 2002 | General |
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