The author reviews Michael Glennon's Limits of Law, Prerogatives of Power: Interventionism After Kosovo, discussing Glennon's approach to NATO's 1999 bombing to stop the Milosevic regime's ethnic cleansing of Kosovo in the face of the UN Charter's absolute ban on states using force except in self-defense. Finding Glennon's study at once provocative and readable, the author emphasizes the strength of Glennon's core point - the inability for the Kosovo campaign to be reconciled with the UN charter - but points to the dangers of using one instance (Kosovo) to prove bad law.