Of all the major philosophical works, Kant's "Critique of Pure Reason" is one of the most rewarding, yet one of the most difficult. Norman Kemp Smith's "Commentary" elucidates not only textural questions and minor issues, but also the central problems which arise, he contends, from the conflicting tendencies of Kant's own thinking. Kemp Smith's "Commentary" is reissued here with an introduction by Sebastian Gardner to set it in its contemporary context.