Books like The Good Sex Guide
David Delvin
The Good Sex Guide is 144 pages, about 2 hours 38 minutes at 250 words a minute.
12 books to read next
How long each takes
The Kama Sutra 3.5 h 
The Joy of Sex 4.6 h 
Anne Hooper's Pocket Kama Sutra 2.9 h 
The Ethical Slut 5.4 h 
The Multi-orgasmic Man 4.4 h 
The Guide To Getting It On! 13.4 h 
Dear G-spot 4.6 h 
Intercourse 4.8 h 
The Ultimate Sex Book 3.5 h 
Secret Sexual Positions 2.5 h 
More Joy of Sex 4.4 h 
Sex 5.6 h Bar height shows length. Estimated at 250 words a minute.