| Presidential Commission of Inquiry Into the Affairs of Air Lanka Limited | Govt of Sri Lanka | N/A | 1987 | Politics |
| Press in Ceylon, The | W.L. | Fernando | 1973 | General |
| Press With the Toes in the Grass | Barbara | Sansoni | 2003 | Literature |
| Prevention and Alleviation of Disease | B.S. | Jayawardene | 1949 | General |
| Preventive Diplomacy | Kumar | Rupesinghe | 2008 | General |
| Price Catalogue of Ancient Coins of Ceylon | T.M. | de Silva Abeywardene | 1952 | General |
| Priest, Pundit & Pedagogue - Rev. Fr W.L.A.Don Peter | Reginald Masson | Rodrigo | 1991 | Religion |
| Primer on Building Community Leaders, A P.E.A.C.E | Maureen | Seneviratne | 2007 | General |
| Prince & Princess of Wales Colleges, Moratuwa - Jubilee Souvenir, 1876 - 1951 | N/A | N/A | 1951 | General |
| Prince of Wales Eastern Book, The - Voyages of HMS Renown 1921-22 | N/A | N/A | 1922 | General |
| Prince Vijaya Pala of Ceylon 1634-1654, The | P.E. | Pieris | 1928 | History |
| Princes In All The Earth - A Study of Children in Society in Sri Lanka | Kenneth. M | De Lanerolle | 1981 | General |
| Principles of Ceylon Law | H.W. | Tambiah | 1972 | General |
| Prison Statistics of Sri Lanka - Vol 5, 1986 | Prison Headquarters | Statistics Division | 1986 | General |
| Prisoner of Paradise, The | Romesh | Gunesekera | 2012 | Literature |
| Prisoners of the Boer War in Ceylon & Dutch East Indies | R. L. | Brohier | 2015 | General |
| Prisoners of the Japanese | Roger | Bourke | 2006 | General |
| Prisoner\'s Gold, The | Chris | Kuzneski | 2015 | Literature |
| Problem of Nachiketas, The | J. F. | Samaranayake | 1973 | Literature |
| Problems of Ceylon History | G.C. | Mendis | 1967 | History |
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