Kant’s Critique of Pure Reason is so outstanding among modern philosophical works, that it can be termed the foundation of modern philosophy. Schopenhauer termed it the most important book ever to have been written in Europe. Otfried Hoeffe guides the reader through the Critique one step at a time, expounding Kant’s thoughts, submitting them to an interpretation and drawing a summary conclusion, placing the work and its topics within the context of its modern successors. A critical interpretation of Kant’s text reveals that he had something to say on many discussions that are said to have originated after his death. Reducing his argumentation to its central tenets, it can be made stronger and applicable to current problems. Kant’s eventual concern, however, even when writing theoretical philosophy, lay with the practical. Elaborating this concern and its connection to Kant’s theoretical philosophy is a prime tenet of this book.