<P>The greatest strength of this thoroughly revised and expanded edition of Lectures on International Trade is its rigorous algebraic and geometric treatment of the various models and results of trade theory. The authors, who now include Arvind Panagariya, offer both policy insights and empirical applications. They have added nine entirely new chapters as well as new sections to several existing chapters (e.g., a greatly expanded treatment of the growing theory of preferential trade agreements).</P>