The work pictured here seems to be a later item, but I would recommend to students of the Middle East and North Africa that they find "A History of the Maghreb," the 1971 edition (Cambridge), by the same author, which is very useful for checking general trends, verifying dates and the roles of various personalities, and so on. As a reference work, the 1971 item, to my mind, has not been superseded. I consulted this work while writing so many papers (in recent graduate work), writing reviews for academic journals, etc.
If you can find a copy of this work, you will find it very useful.
Good hunting!