Mary Jo Sharp opens with her own story of conversion from atheism to Christianity. She talks about her early struggles with doubt and her efforts to believe in the truth of the Bible. Her search for answers led her into the filed of apologetics. Apologetics is "a defense" for the Christian faith. Apologetics involves knowing what you believe, why you believe, and how to defend it. Sharp gives three reasons for studying apologetics: (1) to answer doubt, (2) to build confidence, (3) to change lives. She goes on to explain several ways to do these vital tasks effectively.