For several decades, David Gauthier has been one of the leading philosophers working on practical rationality and deliberation. This book presents a selection of Gauthier's writings on these topics, all but two of which were written after Morals by Agreement (OUP, 1986). They represent Gauthier's most important contributions to the theory of practical reason, moving some distance from the view a first presented in "Reason and Maximization" and developed in a much-reprinted chapter of Morals by Agreement. These essays challenge common misconceptions of Gauthier's revisionist conception of practical rationality, and provide important insights with implications for economic theory.