Books like Should We Eat Meat?
Vaclav Smil
Should We Eat Meat? is 280 pages, about 5 hours 8 minutes at 250 words a minute.
6 books to read next
How long each takes
Eating Animals 6.7 h 
Animal Liberation 5.9 h 
Be Your Own Doctor 3.5 h 
The Beverly Hills Diet 4.8 h 
Diet and Health 5.1 h 
Becoming Vegan 5.2 h Bar height shows length. Estimated at 250 words a minute.