What is the author's style in The Reason for God: Belief in an Age of Skepticism by Timothy Keller?

"The Reason for God, Belief in an Age of Skepticism" by Timothy Keller is written in the first-person narrative. Keller provides an account of his personal journey to Christianity as well as his role as a pastor in the Redeemer Presbyterian Church in Manhattan. Not surprisingly, Keller's background and experience make him the perfect author for the subject matter.