Books like Christian Slaves, Muslim Masters
Robert C. Davis Jr.
Christian Slaves, Muslim Masters is 268 pages, about 4 hours 55 minutes at 250 words a minute.
7 books to read next
How long each takes
White Gold 6.2 h 
Slave 6.4 h 
Islam's Black Slaves 5.3 h 
1493 10.3 h 
Capitalismo y Esclavitud 5.2 h 
The Slave Trade 16.7 h 
Slave Ship 8.2 h Bar height shows length. Estimated at 250 words a minute.