Mark Osiel’s provocative new book, The End of Reciprocity: Terror, Torture and the Law of War, provides detailed discussions of a number of important moral and legal issues arising for the United States in its ongoing response to the threats posed by the Al Qaeda terrorist network. The specific focus is the US-deployed counter-terrorist methods of sustained detention, torture, and targeted killing of suspected terrorists. The author, Mark Osiel, displays a wide knowledge of relevant literature in a number of fields, including international law, philosophy, sociology and cultural studies.