Books like Fröhliche Wissenschaft
Friedrich Nietzsche, Bernard Williams, Josefine Nauckhoff, Adrian Del Caro
Fröhliche Wissenschaft is 370 pages, about 6 hours 47 minutes at 250 words a minute.
12 books to read next
How long each takes
The Wisdom of Insecurity 2.6 h 
Freedom from the Known 2.4 h 
The Courage To Be Disliked 5.3 h 
Why I Am Not a Christian 4.1 h 
Either/or 4.5 h 
The Perennial Philosophy 6.2 h 
Power 8.9 h 
Eclipse of God 3.1 h 
Philosophy of Religion 12.3 h 
3Am Questions 6.5 h 
Meditations 3.7 h 
12 Rules for Life 8.8 h Bar height shows length. Estimated at 250 words a minute.