Jonathan Bennett has produced a sequel to his book on the first half of the Critique of Pure Reason. He does not try to cover all the rest of the Critique. He restricts himself to the Transcendental Dialectic. He rightly claims that his is the only book in English treating exclusively of the Dialectic as a whole. It is not written as a commentary dealing with passage by passage. Many passages are left untreated. A distinctive merit is his extensive comparison of Kant with Descartes and Leibniz.