He is the author of Legal Imperialism: Sovereignty and Extraterritoriality in Japan, the Ottoman Empire, and China (2010, Cambridge University Press). His articles appeared in International Studies Quarterly, International Studies Review, Islam and Christian-Muslim Relations, and Human Rights Quarterly. His research focuses on religion and international relations, human rights, and interfaith relations. Currently he is working on a book, The Organization of Islamic Cooperation: Politics, Problems, and Potential.