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 textual 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 continues to be in demand with Kant scholars, and for this reissue of the classic 1923 edition, Sebastian Gardner provides a new introduction to reveal the continued value of Kemp Smith's Commentary in the contemporary context.