Books like The Forgotten Cause of the Civil War
Lawrence Raymond Tenzer
The Forgotten Cause of the Civil War is 273 pages, about 5 hours at 250 words a minute.
8 books to read next
How long each takes
Half Slave and Half Free 5.4 h 
Apostles of Disunion 2.9 h 
What They Fought for, 1861-1865 1.6 h 
North and South 14.4 h 
Jubilee 7.9 h 
Ordeal by Fire 12.7 h 
Disunion! 8.4 h 
The Unvanquished 5.4 h Bar height shows length. Estimated at 250 words a minute.