Ever since Martin Luther, the famous sixteenth-century Reformer, nailed his ninety-five theses to the castle door of Wittenberg, the doctrine of justification by faith alone has been one of the great truths of the Reformed faith. In this concise booklet J. V. Fesko takes a fresh look at this critical doctrine, explaining biblical teaching, examining classic Reformed statements, and answering common questions. Explains the doctrine of justification in uncomplicated, nontechnical language. Part of the Basics of the Reformed Faith series, which introduces lay readers to Reformed distinctives.