Books like The Guns of the South
Harry Turtledove
The Guns of the South is 561 pages, about 10 hours 17 minutes at 250 words a minute.
12 books to read next
How long each takes
The Plot Against America 7.5 h 
The Crisis 8.0 h 
Love and War 18.7 h 
Galloway 2.9 h 
Battle Flag 8.4 h 
Battle Cry of Freedom Part 1 of 3 16.8 h 
Cold Mountain 8.2 h 
Ashes in the Wind 12.3 h 
Alvin Journeyman 7.6 h 
Andersonville 14.1 h 
The River Between Us 3.2 h 
Stormy Surrender 7.9 h Bar height shows length. Estimated at 250 words a minute.