What to read after International Crime and Punishment?

"International crime and punishment has captivated (or recaptivated) our attention since the early 1990s. Both the substantive contents of international crimes and the ways and means of punishing them have given us a great deal of food for thought. The entry into force on July 1, 2002 of the Rome Statute of the International Criminal Court has spurred further soul searching on these issues. This collection presents some voices in this debate. The issues tackled herein are among the more difficult and the less-treated ones. They relate to the definition of aggression, mistake of law as a defense, the doctrine of command responsibility, and the International Committee of the Red Cross as a witness before international criminal tribunals. These are more or less unsettled issues, and they cry out for rigorous treatment." -- from the Preface, p. [v].