An outstanding book. Michael Cook is wiser than he lets on (ie he does not explicitly make big sweeping statements about the lessons of history, but his presentation of the facts is nonetheless based on very sophisticated and wise analysis, which may remain implicit, or he may just hint at the issue and expect that the reader will know why he brought it up exactly like this) and always worth reading.
This is a survey of all of Muslim history from the time of the prophet to the early 20th century. He covers every region and pretty much every dynasty or group that ever ruled from Morocco to Malaysia, but it is not just a recitation of facts; at every point he has interesting things to say and he has a remarkable ability to convey a lot of information in a very short passage. Still, a lot of the details can be skipped if it is not an area you are interested in.
For example, I am very interested in Indian history and I found the short (just 60 pages) section on India to be one of the most balanced and accurate summaries of the 800 years of Islamicate colonization of India and its consequences. So the book passes the Gell-Mann test with flying colors.
A must read.