 Thus Spoke Zarathustra
| 1883 | 74 reads | 356 pages? duration |
 Phenomenology of Spirit
| 1973 | 12 reads | 621 pages? duration |
 Philosophical investigations
| 1953 | 10 reads | 266 pages? duration |
 Ethics
| 1677 | 14 reads | 186 pages? duration |
 A History of Western Philosophy
| 1945 | 25 reads | 895 pages? duration |
 Discourse on Method and Meditations on First Philosophy
| 1637 | 15 reads | 103 pages? duration |
 Critique of Pure Reason
| 1781 | 29 reads | 792 pages? duration |