The Illusion of Free Markets is a beautifully written and well-researched book that addresses two subjects of great contemporary significance: the conceptualization of market exchange as "free" and "natural," and the expansion of the American penal system. The book argues that the way we think about markets has shaped—indeed, distorted—the way we think about criminal justice, and it is time to rethink both. Harcourt's claims will spur lively and much needed debate.