The website for Tim Keller’s book, The Reason for God, is fantastic, loaded with audio downloads and a study guide. This looks like a great book for the modern church. First Things has a lengthy interview with Keller, which appears to be linked from many blogs. Keller says:

I think the new-atheism thing was an impetus [to writing the book], and it was also an opportunity, because I believe that this book, say, three or four years ago, the average secular person in a Barnes & Noble wouldn’t necessarily—why would you pick up a book that’s designed to say orthodox Christianity’s true? But now, as part of the cultural conversation, the book’s title immediately positions it as an answer.

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Penguin probably was willing—which doesn’t even have a religion division—the reason Penguin was interested in it was because of the cultural conversation and the new atheists. I don’t think they would have picked it up otherwise, frankly. But they’ve been really supportive, wonderful.