This books looks at, what the author sees as, some of the good and some of the bad in several Christian "traditions" (Protestant, Orthodox, Catholic, Anabaptist, etc.)
I felt like the author was raising some good questions and making fair points, though it was somewhat less original then I had anticipated. I know this sounds like a slam, but I do not mean it to be. Great teachers often represent old ideas in new ways. But being that this book came from the "emergent" crowd and the fact that the author often referred to "ways" that transcend old definitions, he doesn't clearly spell out what it means to be a "post-conservative and post-liberal". I'm 26 and attended university for two years in a very left wing university in France, so I don't think it's that I'm to old or out of it to grasp the values of the emerging generation, though, it is possible. Basically he highlights a lot of the values he has found in other traditions and calls for them to be a part of the church of tomorrow.
His point about the Bible being narrative theology was well done, though I've thought about the Hebrew taking of the promise land in quite the terms he described. He seems to be open to evolution as an idea, which may bother some, but he doesn't really dwell on this. At one points he mentions that the substitutionary atonement was not in the original creeds and seems to infer that perhaps shouldn't be among our fundamentals (though he doesn't say this directly). Many others, including myself, see this as one of the very foundations of Christian belief and how one can practice the presence of God (which he calls us to) without experiencing this truth atonement puzzles me.
His presentation of the Anabaptists was gold. So was his presentation of Pentecostals and contemplatives, two groups that aren't often associated. He does sight the reformed faith as being a creed which led to slavery in the new world or at least justified it. As far as I know, it was the Northern part of America which tended to be of the reformed faith and the south (especially the rich slave owning ones) tended to adhere mostly to the Anglican Church. (I am neither)
I would disagree with one of his presuppositions, namely, that we need to change our message because we live in a dynamic context. I disagree. There is nothing new under the sun. The problems of sin, immorality, evil, depression that faced my parent's (and McLaren's) generation are the same today. Our reaction to them maybe different and our culture may be different, but our problems are the same and we need the eternal gospel preached to us, though perhaps in a different form, we need the same message.