Books like The Great War - Breakthroughs
Harry Turtledove
The Great War - Breakthroughs is 508 pages, about 9 hours 19 minutes at 250 words a minute.
12 books to read next
How long each takes
The Crisis 8.0 h 
Love and War 18.7 h 
North and South 14.4 h 
Abraham Lincoln 11.7 h 
Bring the Jubilee 3.6 h 
Copperhead 8.8 h 
Andersonville 14.1 h 
Stormy Surrender 7.9 h 
The Science of Homeopathy 6.1 h 
Before They Are Hanged 10.6 h 
All Quiet on the Western Front 4.6 h 
Ordeal by Fire 12.7 h Bar height shows length. Estimated at 250 words a minute.