'Religious reasons' are commonly treated as a distinctive kind of reason, marked off as an autonomous domain and protected from reflective analysis. Brafman's Critique of Halakhic Reason powerfully refutes this account. In dialogue with contemporary moral and legal philosophy, Brafman uncovers the diverse array of reasons for the commandments that are given within Jewish law and philosophy. Developing a constructivist theory of practical reason, Brafman shows how reasons must be given even for divine authority. Morality derives from the justified claims persons-divine or human-make on each other. Rich with implications for theology, philosophy of religion, ethics, and political philosophy, The Critique of Halakhic Reason is a signal contribution.