Sam HamstraSam Hamstra Jr. has been a pastor and author for more than twenty-five years. Presently he serves as Adjunct Professor of Worship at Northern Seminary (Lombard, IL). His previous work includes Reformed Confessionalism in Nineteenth-Century America: Esays on the Thought of John Williamson Nevin, a project he coedited with Arie J. Griffioen (1995). Read More Read Less