What is the author's style in To Own a Dragon: Reflections on Growing up Without a Father by Don Miller?

Donald Miller writes about absent fathers from first hand experience. He describes much of his childhood without a father. Such an experience left him lacking maturity and self-worth. In his early adulthood, he sought out much of the wisdom that he lacked. He found a majority of this wisdom in mentors, such as John MacMurray. Now, Miller writes this book to encourage both men without fathers and the men who mentor them. He offers hope to anyone who struggles in life, because such struggles build one's empathy, which allows one to help others.