He is the author of four books and more than fifty articles exploring the intersections of law and ethics. His work has appeared in leading international and Australian journals, including the Modern Law Review, the Oxford Journal of Legal Studies, Ratio Juris,Jurisprudence, the Melbourne University Law Review, the Sydney Law Review and the Australian Journal of Legal Philosophy. His books include Australian Constitutional Law: Foundations and Theory (3rd ed, Oxford University Press, 2012) (with Suri Ratnapala) and Principles of International Humanitarian Law (Edward Elgar, 2013) (with Kylie Weston-Scheuber).