Mike Wittmer is Professor of Systematic Theology at Grand Rapids Theological Seminary. He and his wife Julie have three children, Avery, Landon, and Alayna. Because of them, he has no hobbies. Mike frequently preaches in churches and conducts worldview seminars for Christian groups. He enjoys writing books, such Heaven Is a Place on Earth, Don’t Stop Believing, Christ Alone, The Last Enemy, and Despite Doubt, which help Christians to treasure and apply the gospel to their lives.