I thoroughly recommend Tim Keller’s new book The Reason For God. I am just getting into it, but I can already tell that it is going to be great. The premise of the book, as I see it, is that doubts about Christianity and God’s existence rest upon assumptions furnished by alternative beliefs. In the first section of the book, “The Leap of Doubt,” Keller examines these assumptions and shows how they are inconsistent with their own premises. (For example, he shows how relativism is really covert absolutism.) In the second section of the book, “The Reasons for God,” Keller argues for the plausibility and consistency of belief in God.
Its winsome, intelligent, and intelligible to people without religious background. I think its going to be very helpful for both skeptics and believers.