The following was posted to Reddit by user Adartesirhc. We have linked to the free public domain work where applicable. All other links are to Amazon. Kant, Idealism, and Nietzsche: # 1 Kant - Critique of Pure Reason Download the free ebook from Project Gutenberg. #2 Kant - Groundwork of the Metaphysics of Morals Read it for free here. #3 Fichte - An Attempt at a Critique of All Revelation Buy it here. #4 Hegel - The Phenomenology of Spirit Buy it here. #5 Hegel - Philosophy of History Buy it here. #6 Schopenhauer - The World as Will and Representation Read it for free here. #7 Nietzsche - Beyond Good and Evil Read it for free here. #8 Nietzsche - On the Genealogy of Morals Read it for free here. #9 Nietzsche - Twilight of the Idols Buy it here. Marxism: #10 Marx - Economic and Philosophical Manuscripts of 1844 Read it for free here. #11 Marx - Theses on Feuerbach Read it for free here. #12 Marx - The German Ideology Read it for free here. #13 Marx - Capital Read it for free here.