Books like The Great Arab Conquests
Hugh (Hugh N.) Kennedy
The Great Arab Conquests is 421 pages, about 7 hours 43 minutes at 250 words a minute.
12 books to read next
How long each takes
The Arabs in History 3.7 h 
Islam 4.2 h 
Bushidō 2.2 h 
Exploitation and Instability in Nigeria 5.3 h 
Sword and Scimitar 6.5 h 
History of the Arabs 15.1 h 
In the Shadow of the Sword 9.7 h 
Public Policy Analysis 8.7 h 
The Iron Wall 14.4 h 
Kargil 5.3 h 
Destiny Disrupted 7.4 h 
Reclaim Your Heart 3.6 h Bar height shows length. Estimated at 250 words a minute.