Volf: Allah- a christian response

Miroslav Volf is one of my favourite theologians.
Today I received his "Allah:a christian response" in the mail.
I'm about half way through, and so far, it is a terribly disappointing book.
Poorly written, self congratulatory, engaging in caricatures, logically flawed, muddled and worst of all, theologically pretty facile. There are some interesting and illuminating points, but I don't think they support his argument, that christians and muslims worship the same God, very well.
Though he rejects Feurbach, Volf effectively treats God as a bunch of concepts held inside the head of professional theologians.
Perhaps the second half will be much better.