Immanuel Kant's groundbreaking Critique of Pure Reason inaugurated a new way of understanding the world that continues to impact philosophy to the present day. With clear explanations and numerous examples, A Companion to Kant's Critique of Pure Reason takes students step by step through the book in a way that captures their interest without sacrificing depth or intellectual rigor. Although it is informed by recent Anglo-American scholarship, the Companion focuses on Kant's own arguments rather than secondary texts and scholarly debates that may otherwise distract from what Kant himself is attempting. The Companion first places the Critique in its historical and philosophical context before addressing the three main parts of the book in order: the Transcendental Aesthetic, the Transcendental Analytic, and the Transcendental Dialectic. The Companion also briefly explains how Kant continues his investigation into God, freedom, and immortality in the Critique of Practical Reason, and it concludes with an assessment of Kant's importance in the history of modern philosophy. Key features include a glossary of technical terms, with succinct definitions and cross-references, as well as an annotated bibliography of the most important English-language secondary sources on Kant's theoretical philosophy.