Walter and I have been reading The Reason for God by Tim Keller recently. It's a good book so far. It answers a lot of good challenging questions for skeptics of Christianity. Here is an interview with Tim Keller that I recently read: http://www.firstthings.com/onthesquare/?p=981

Here is a recent Newsweek article about Keller:

http://www.newsweek.com/id/109609