... is Brian McLaren's A Generous Orthodoxy. If you have the time and the desire to stretch your understanding of reality and God and stuff, this is an amazing book.
There is also a Generous Orthodoxy blog that I bloitter at. I read it this evening. It was one writer's favorite quotes from the book.
A quote from A Generous Orthodoxy: "Having read this sentence, you may perhaps better understand why I believe a person can affiliate with Jesus in the kingdom-of-God dimension without affiliating with him in the religious kingdom of Christianity. In other words, I believe that Christianity is not the kingdom of God. The ultimate reality is the kingdom of God, and Christianity at its best is here to proclaim and lead people into that kingdom, calling them out of smaller rings, smaller kingdoms. Christianity at its worst, using the definition in this paragraph, can become a sin when it holds people within its ring and won't let them enter the kingdom of God. Jesus diagnosed the religious leaders of his day as doing this very thing."