When Martin Luther posted his Ninety-Five Theses (reputedly nailed to the door of the Castle Church in Wittenberg), he unwittingly launch a movement that would dramatically change the course of European history. This superb short introduction to Martin Luther, written by a leading authority on Luther and the Reformation, presents this pivotal figure as historians now see him. Instead of singling him out as a modern hero, historian Scott Hendrix emphasizes...