Books like Erotica Universalis
Gilles Néret
Erotica Universalis is 755 pages, about 13 hours 51 minutes at 250 words a minute.
6 books to read next
How long each takes
The Erotic Arts 9.9 h 
The Nude 7.5 h 
Erotic Art of the Masters 3.8 h 
The Tears of Eros 3.9 h 
Tom of Finland 3.8 h 
Studies in Erotic Art 7.3 h Bar height shows length. Estimated at 250 words a minute.