Books like Epistulae Morales
Seneca the Younger
Epistulae Morales is 127 pages, about 2 hours 20 minutes at 250 words a minute.
12 books to read next
How long each takes
A Manual for Living 1.6 h 
Art of Living 2.4 h 
Nicomachean Ethics 6.0 h 
Manual 48 min 
Meditations 3.7 h 
Plutarch's Moralia 5.3 h 
Lives 8.6 h 
De Officiis 4.7 h 
The Ethics 4.9 h 
Self-knowledge 3.8 h 
The Letters to His Friends 7.2 h 
The Letters of Marcus Tullius Cicero to Several of His Friends 7.5 h Bar height shows length. Estimated at 250 words a minute.