Bargaining with the Devil, to Robert Mnookin, means negotiating with someone who has intentionally done harm and may well do so in the future: “an adversary whose behavior [one] may even see as evil.” 1 Should one negotiate with such a person or such a regime? Surprisingly, in this book, the Chair of Harvard’s Program on Negotiation argues that there are circumstances in which the wise decision is to fight the harm-doer rather than negotiate. But that decision, if it is truly wise, can be made only after a rigorous analysis of the situation. In this book Mnookin sets out a framework to help in that analysis and illustrates it by reference to eight case histories. The question posed by the book’s sub-title is stark: when to negotiate, when to fight?