Kant's Critique of Pure Reason is one of the most important works in the Western philosophical tradition, which made seminal contributions to epistemology, metaphysics, and the foundations of moral philosophy. This second edition streamlines and updates its editors' Introduction, and extensively updates its Bibliography. It renders Kant's terminology and style of argument more accurately and accessibly than any other translation into English. It also supplies more extensive annotation and contextualization of Kant's work than any other edition in English or even in German, recording not only all the variations between the two substantially different editions of the book that Kant published in 1781 and 1787 but, for the first time in any edition, all of the notes he made in his own copy in the period between those two editions. This translation makes well-informed study of the Critique in English more possible than ever before.