 Proposed Roads to Freedom: Socialism, Anarchism and Syndicalism
| 108 pages? duration |
 The Problems of Philosophy
| 107 pages? duration |
 Groundwork of the Metaphysics of Morals
| 82 pages? duration |
 Why I Am Not a Christian and Other Essays on Religion and Related Subjects
| 266 pages? duration |
 Critique of Practical Reason
| 186 pages? duration |
 Prolegomena to any future metaphysics that will be able to come forward as science
| 270 pages? duration |
 Tractatus Logico-philosophicus
| 143 pages? duration |
 Introduction to Mathematical Philosophy | 238 pages? duration |
 Conjectures and Refutations
| 608 pages? duration |
 The Metaphysics of Morals
| 284 pages? duration |
 The Principles of Mathematics
| 576 pages? duration |
 Mysticism and Logic
| 192 pages? duration |
 Religion and Science
| 272 pages? duration |
 Political Ideals
| 74 pages? duration |
 Objective Knowledge: An Evolutionary Approach
| ? pages? duration |
 All Life is Problem Solving
| ? pages? duration |
 Quantum Theory and the Schism in Physics: From The Postscript to the Logic of Scientific Discovery
| 230 pages? duration |