Timothy Keller is an American pastor, theologian, and Christian apologist. He is the chairman and co-founder of Redeemer City to City, which trains pastors for service around the world. He is also the founding pastor of Redeemer Presbyterian Church in New York City, New York and the author of The New York Times bestselling books The Prodigal God: Recovering the Heart of the Christian Faith (2008), Prayer: Experiencing Awe and Intimacy with God (2014), and The Reason for God: Belief in an Age of Skepticism (2008). The prequel for the latter is Making Sense of GOD: An Invitation to the Skeptical (2016).Keller was born in Allentown, Pennsylvania, to Louise A. Keller (Clemente) and William B. Keller, a television advertising manager. Keller is a graduate of Bucknell University (BA, 1972), Gordon-Conwell Theological Seminary (M.Div., 1975) and Westminster Theological Seminary, where he received his D.Min. in 1981,under the supervision of Harvie M. Conn. He became a Christian while at Bucknell University, due to the ministry of InterVarsity Christian Fellowship, with which he later served as a staff member.He was ordained by the Presbyterian Church in America (PCA) and served as a pastor at West Hopewell Presbyterian Church in Hopewell, Virginia for nine years, while serving as director of church planting for the PCA.He also served on the faculty of Westminster Theological Seminary, in Philadelphia, Pennsylvania, where he and his wife Kathy Keller were involved in urban ministry.