"Martin Chemnitz -- the Second Martin of the Lutheran Reformation -- stands with Luther and Melanchthon as an author of the Lutheran confessions and father of Lutheran theology. He was the chief author of the Formula of Concord, the most consulted theologian of the late Reformation, and a voice to unite the factionalized Lutherans of Germany. He has been called, after Martin Luther, the most important theologian in the history of Lutheranism." From the back of the book.