Eric Metaxas was born in New York City in 1963, and grew up in Danbury, Connecticut. He graduated from Yale University, where he edited the Yale Record, America's oldest college humor magazine. He has written several biographies, including Amazing Grace: William Wilberforce and the Heroic Campaign to End Slavery and the New York Times bestseller, Bonhoeffer: Pastor, Martyr, Prophet. He has also written over 30 children's books, including It's Time to Sleep, My Love and Squanto and the Miracle of Thanksgiving.
Timothy J. Keller was born in 1950. He received a B.A. from Bucknell University in 1972, a M.Div. from Gordon-Conwell Theological Seminary in 1975, and a D.Min. from Westminster Theological Seminary in 1981. He was ordained by the Presbyterian Church in America and served as a pastor in Virginia for nine years. He is founding pastor of Redeemer Presbyterian Church in New York City, New York. He has written several books including Grace Changes Everything, Generous Justice: How God's Grace Makes Us Just, and The Reason for God: Belief in an Age of Skepticism, which won awards from World Magazine and Christianity Today.