 Thus Spoke Zarathustra
| 1883 | 117 reads | 3.82 | 356 pages? duration | |
 Phenomenology of Spirit
| 1973 | 18 reads | 4.25 | 621 pages? duration | |
 Philosophical investigations
| 1953 | 14 reads | 4.73 | 266 pages? duration | |
 Ethics
| 1677 | 18 reads | 3.88 | ? pages? duration | |
 A History of Western Philosophy
| 1945 | 36 reads | 3.97 | 895 pages? duration | |
 Discourse on Method and Meditations on First Philosophy
| 1637 | 28 reads | 3.8 | 136 pages? duration | |
 Critique of Pure Reason
| 1781 | 46 reads | 3.4 | 792 pages? duration |