- The International Criminal Court: An Introduction
- The Death Penalty in Africa: Foundations and Future Prospects
- Comparative Executive Clemency: The Constitutional Pardon Power and the Prerogative of Mercy in Global Perspective
- Transnational Human Rights Litigation: Challenging the Death Penalty and Criminalization of Homosexuality in the Commonwealth
- The Global Decline of the Mandatory Death Penalty: Constitutional Jurisprudence and Legislative Reform in Africa, Asia, and the Caribbean