Galli is the managing editor of Christianity Today magazine. He previously edited Christian History. He received a Master of Divinity degree from Fuller Theological Seminary in Pasadena, California, and for 10 years served as a Presbyterian pastor in parishes in Mexico City and California. He has written books on preaching, prayer and the challenges of pastoral ministry, and is a contributing writer to The Christian Millennial History Project. He is married with three children.
John Koessler is chair and professor of pastoral studies at Moody Bible Institute. He is the author of several books, including The Surprising Grace of Disappointment and True Discipleship. He and his wife, Jane, live in northwest Indiana and have two sons.