Informative history, decently written, not a page-turner. But now 95% of what I know about the Caucasus region (Georgia, Armenia, Azerbaijan, Chechnya, Ossetia, the Circassians and so on) is what I gleaned from this book.
The good thing about this book is that it's a serviceable introduction to the Caucasus for anyone who's not terribly familiar with the region. Unfortunately, it's difficult for an English-language reader to progress much further since a lot of the scholarship is in Russian or some other foreign lang...