The texts in this volume begin and end with this same point. Composed under different circumstances by giants of the Reformed tradition—Theodore Beza (1519–1605), Amandus Polanus (1561–1610), and Francis Turretin (1623–87)—they represent genres of classical treatments of the same doctrine. Beza’s Defense of Justification by Faith Alone is polemical and in response to ecclesiastical controversy. Polanus’ Free Justification of Man the Sinner before God is systematic and the fruit of logical argumentation based on Scripture. Turretin’s Harmony of Paul and James on the Article of Justification is exegetical and in the form of an academic disputation. Each text explores aspects of justification from a different angle. Together they touch on a host of important theological concerns: the nature of faith, good works, sanctification, union with Christ, the Holy Spirit, hermeneutics, the unity of Scripture, and more. They are offered here in English translation for the first time.