Just got it. :)
I like the premise, and the book started strong for me. But the author seemed so naive. He‘s surprised that the ecumenical movement exists and has considered Abraham as the father of the People of the Book before him! Really?! And his biases showed through more at the end also. Still, it is worth reading for the first half. For a more balanced view try The Faith Club, which is written from three perspectives. Between pick and so-so.