Tim Keller, Pastor of Redeemer Presbyterian Church in Manhattan, is one of the best "missional preachers" in the U.S. today (in my humble opinion).

The content of his preaching is somewhat "cerebral" -- engaging some of the most common intellectual challenges that both Christians and non-Christians face when seeking the face of God or the meaning of their existence. And this stands to reason: a big part of missional preaching is sensitively contextualizing the Gospel message, and Redeemer Pres. is made up largely of youngish, on-the-rise professionals in an environment that fancies itself as cutting edge.

It also means that Keller's preaching is often very helpful for those outside his congregation who have many of the same pressing questions. What's underneath our culture's best formulated objections to faith in Jesus Christ? How can we address them well? What unselfconscious concepts of God or humanity or salvation has the church embraced that have prevented us from being a counter-culture for the common good?

I haven't read it yet (trying to meet a dissertation deadline), but Keller has recently published a book that will be of interest to most Presbyterians who are seeking the missional renewal of the church. It's called The Reason for God: Belief in an Age of Skepticism, and can be viewed here on Amazon. The reviews of the book are quite good, and being familiar with Keller's approach, I'm confident it's a worthwhile and provocative read.

I also found that the Veritas Forum has both audio and video of a "talk" given by Keller on the topic of his book at a University of Chicago forum. Head over to the Forum's website and check it out. Part One of Keller's talk is here, and Part Two is here.