This book was so dreary, that I gave up reading it on page 120 out of 146 ("real" pages, the rest are notes and such). I've literally read translator glossaries cover-to-cover, and even I couldn't endure this. Don't bother reading this book.
This book wasn't all bad. The first 40 pages or so were actually pretty interesting. I enjoyed reading about the idea of how the seemingly-uniform empires on a map get translated into local authority, especially in the borderlands, hinterland, and frontiers. I also enjoyed reading about the founding of the al-Sanusi Sufi order, and how sufi lodges worked.
However, my interest began to wane once we shifted to the Ottoman's failed diplomacy to defend their Central Sudanic claims, and to two (!) chapters devoted to telegraph lines in the Hijaz. Who is demanding MORE chapters about Arabian telegraphs? I abandoned the book entirely during the last telegraph chapter.
Overall, I found this book to be unfocused and confusing, failing to deliver on any of its basic themes. The preface states that this started as an investigation into the life of a government official named Azmzade, from a prominent Syrian family. However, despite introducing every chapter with a quote, Azmzade at best flits in-and-out of the narrative; I wouldn't notice if he were absent entirely. The book claims to be about Ottoman ambitions in Africa, yet mostly focuses on the relationship with the al-Sanusi sufi order, rather than on the African polities directly. Finally, for a book purportedly about geopolitics and the imagination and defense of borders and frontiers, it would have been nice if the author included some maps that were not just black-and-white facsimiles written in Ottoman Turkish.
Here is a summary of this book: The Ottomans tried to coordinate with the al-Sanusi sufi order to strengthen their claims to the Sahara and Central Africa; the Europeans ignored them and invaded anyway. The Ottomans struggled to use telegraphs effectively, because European-owned companies were a security risk and Bedouins kept attacking the lines.
There. Now I've saved you from reading 150 pages. Go read something better instead.