Alec Ryrie is a professor in the department of theology and religion at Durham University in Durham, England. He is the author of Protestants: The Faith that Made the Modern World.

Thomas Kaufmann is a professor of church history at the University of Göttingen in Göttingen, Germany. He is chairman of the Association for the History of the Reformation and is the author of multiple books and articles about the Reformation.

Richard Cimino is a sociologist of religion based at the University of Richmond in Richmond, Va. He has written about atheism, humanism, Lutheranism and Eastern religions and is the editor of Religion Watch, a journal about trends is American religion.

Mark A. Granquist is an associate professor of church history at Luther Seminary in St. Paul, Minn. He was an editor of Dictionary of Luther and the Lutheran Traditions and is the author of Lutherans in America: A New History. He is ordained in the Evangelical Lutheran Church of America.

Bridget M. Heal is a professor of history at the University of St. Andrews in Scotland. She is an expert on the Protestant Reformation and art and is the author of A Magnificent Faith: Art and Identity in Lutheran Germany. She is also an expert on witchcraft and witch trials and on the Virgin Mary in early […]

Carl R. Trueman is a professor of church history at Westminster Theological Seminary in Glenside, Pa. He teaches a course on the Reformation, which is available online, and is the author of  The Reformation: Yesterday, Today and Tomorrow. Contact via the seminary’s main telephone number or an online email form.

Diarmaid MacCulloch is a professor of the history of the church at St. Cross College at Oxford University in Oxford, England. He is the author of The Reformation: A History.

Lyndal Roper is a professor of history at Oriel College at Oxford University in Oxford, England. She is an expert on German religious history, especially Martin Luther and the Protestant Reformation, and the history of witchcraft. She is the author of Martin Luther: Renegade and Prophet.

Jo Walton is a science fiction writer of more than a dozen novels and has won both the Hugo and Nebula Awards, the highest accolades in sci-fi. She is working on a novel called Lent that has religious elements in it. She can discuss religion in science fiction and what it tries to achieve.