Dennis Ngien is Research Professor of Theology at Tyndale University. Formerly the Alister E. McGrath Chair of Christian Thought and Spirituality, he is the author of several books, including Fruit for the Soul: Luther on the Lament Psalms (Fortress, 2015) and Grace and Law in Galatians: Justification in Luther and Calvin (Cascade, 2023).
Robert Kolb, professor of systematic theology emeritus at Concordia Seminary in Saint Louis, Missouri, has taught on five continents and written or edited some thirty books, including The Book of Concord, coedited with Timothy J. Wengert (Fortress Press, 2000), and The Oxford Handbook of Martin Luther's Theology, coedited with Irene Dingel and Lubomir Batka (Oxford University Press, 2014).
