Tread Lightly on the Earth: Religion, the Environment and the Human Future, Stamford Lake, 2010.

Xenotransplantation: The Ethical and Legal Concerns. Sarvodaya Vishva Lekha, 2007.

Islamic Influences on International Philosophy and Law. Sarvodaya 2006.

A Call for National Reawakening. Stamford Lake, 2005.

Armageddon or Brave New World? Reflections On The Hostilities in Iraq. 2nd Edition, Sarvodaya, 2005.

Sustainable Justice: Reconciling Economic, Social and Environmental Law. With Marie-Claire Cordonier Segger. Martinus Nijhoff, 2005.

Universalizing International Law. Martinus Nijhoff, 2004.

The World Court, Its Conception, Constitution and Contribution. Sarvodaya, 2002.

Justice Without Frontiers, Vol II: Protecting Human Rights in the Age of Technology. Kluwer Law International, 1999.

The Lord's Prayer: Bridge to a Better World. Liguori Publications, 1998 (also in Spanish and German). Reprinted Sarvodaya ,1998.

Justice Without Frontiers. Vol I: Furthering Human Rights. Kluwer Law International, 1997.

Impact of Technology on Human Rights: Global Case Studies. United Nations University Press, 1993 - work edited for and commissioned by the United Nations Human Rights Commission and the United Nations University.

Nauru: Environmental Damage under International Trusteeship. Oxford University Press, 1992.

Human Rights and Scientific and Technological Development. United Nations University Press, 1990 - work edited for and commissioned by the United Nations Human Rights Commission and the United Nations University to commemorate the 40th Anniversary of the Universal Declaration of Human Rights.

Islamic Jurisprudence: Some International Perspectives. Macmillans, London and St. Martin's Press, New York, 1988. Reprinted Sarvodaya, 2002.

Nuclear Weapons and Scientific Responsibility. Longwood Academic, New Hampshire, 1987 (also in Japanese, published by Chuo University Press, Tokyo). Reprinted Sarvodaya, 1999.

Law: The Threatened Peripheries. Lake House, Colombo, 1984.

The Slumbering Sentinels: Law and Human Rights in the Wake of Technology. Penguin, Melbourne, 1983.

An Invitation to the Law. Butterworths, Melbourne, 1980. Reprinted Sarvodaya 2007.

Apartheid: The Closing Phases? Lantana, Melbourne, 1980.

Human Rights in Japan. Lantana, Melbourne, 1979.

Equality and Freedom: Some Third World Perspectives. Hansa Publishers, Colombo 1976. Reprinted Sarvodaya, 1999.

The Law in Crisis: Bridges of Understanding. Capemoss, London 1975. Reprinted Sarvodaya , 2001.

The Law of Contracts. Being a Comparative Study of the Roman-Dutch, English and Customary Laws of Contract in Ceylon (2 Volumes, 1965), H.W. Cave & Co., Colombo 1967. Reprinted  1999.

Why the Nuclear Danger Grows from Day to Day, 2005.

Ahimsa ( Mahatma Gandhi's philosophy of non violence), 2005.