This is the first book in English devoted entirely to Kant's Opus Postumum and its place in the Kantian oeuvre. Over the last few decades, the importance of this text for our understanding of Kant's philosophy has emerged with increasing clarity.

Although Kant began it in order to solve a relatively minor problem within his philosophy, his reflections soon forced him to readdress virtually all the key problems of his critical philosophy: the objective validity of the categories, the dynamical theory of matter, the natures of space and time, the refutation of idealism, the...