Robert Letham is Senior Lecturer in Systematic and Historical Theology at the Wales Evangelical School of Theology, Bridgend, Wales.

”It has been said that ideas change the world. Actually, it is people gripped by the ideas that do the changing, as this series of studies of various Christians who did indeed change their worlds reminds us. An extremely interesting and helpful book.“Michael A. G. Haykin(Professor of Church History and Biblical Spirituality, The Southern Baptist Theological Seminary, Louisville, Kentucky)”...an intriguing guide to some outstanding figures of the past by one of the most articulate reformed theological voices of our time.“Leonardo De Chirico(Church planter in central Rome)”...a great book for any Christian who wants to know more about how God has preserved the gospel for them in the face of seemingly overwhelming odds.“David A. Hohne(Lecturer of Theology, Philosophy and Church History, Moore Theological College, Sydney )”Weaving together biography and theology, Letham's Gamechangers shows us once again how fascinating Christian history can be, and how one life can influence generations to come.“Joel R. Beeke(Chancellor, Puritan Reformed Theological Seminary, Grand Rapids, Michigan)”Robert Letham brings a wealth of academic and pastoral experience to bear in this gem of a book ... exposure to, and understanding of, church history needs to figure more prominently in the church's program of Christian education. Letham's book is an excellent entree into it.“New Horizons Magazine