Books like Kant and the Problem of Metaphysics
Martin Heidegger, Friedrich-Wilhelm von Herrmann, Spanish, Friedrich-Wilhelm V. Herrmann
Kant and the Problem of Metaphysics is 283 pages, about 5 hours 11 minutes at 250 words a minute.
7 books to read next
How long each takes
The Philosophy of Hegel 7.4 h 
Metaphysics 2.4 h 
The Problems of Philosophy 2.1 h 
The Phenomenology of Mind 10.9 h 
Kant 2.6 h 
Creative Evolution 7.4 h 
Wer Bin Ich - und Wenn Ja Wie Viele? 7.3 h Bar height shows length. Estimated at 250 words a minute.