 Thus Spoke Zarathustra
| 3.82 | 356 pages? duration |
 Phenomenology of Spirit
| 4.18 | 621 pages? duration |
 Philosophical investigations
| 4.89 | 266 pages? duration |
 Ethics
| 3.95 | 186 pages? duration |
 A History of Western Philosophy
| 4.14 | 895 pages? duration |
 Discourse on Method and Meditations on First Philosophy
| 3.73 | 136 pages? duration |
 Critique of Pure Reason
| 3.3 | 792 pages? duration |