Enjoyed reading the synopsis of Edward Luttwak's new book on Byzantine Grand Strategy: http://www.weeklystandard.com/Content/Public/Articles/000/000/017/131xyleq.asp?pg=1

I have read Luttwak's book on the grand strategy of the Roman empire, and I'm intrigued by the idea of the same style of analysis being made of the Byzantines. In some ways, it cuts to the core of my interest in Byzantium, which is to do with the continuity of policy making as a result of the mechanisms of the imperial administration.

So once this is released in the UK, I think you might just find this on my bookshelf.