Michael S. Horton (PhD Coventry University and Wycliffe Hall, Oxford) is J. Gresham Machen Professor of Systematic Theology and Apologetics at Westminster Seminary California. He has written many books, including The Christian Faith: A Systematic Theology for Pilgrims on the Way (Zondervan Academic, 2011) and Justification: Volumes 1 & 2 (Zondervan Academic, 2018).