John Henry Gerstner (November 22, 1914 – March 24, 1996) was an American Reformed and Presbyterian theologian and professor of Church History at Pittsburgh Theological Seminary and Knox Theological Seminary.
He was an expert on the life and theology of Jonathan Edwards and wrote several books, including Jonathan Edwards, Evangelist. Gerstner's lectures were published by Ligonier Ministries.
Please note that Gerstner does not always use the King James Bible.