One of the most influential of the Reformed catechisms is the Heidelberg Catechism (also known as the Palatinate Catechism). Combining the best of Lutheran and Reformed teaching, and counteracting the teachings of the Roman Catholic Church, it is an instructional manual on the basics of the Protestant Christian faith. The Heidelberg Catechism is divided into 52 sections (called Lord’s Days), and includes 129 questions on the faith, divided into three parts: The Misery of Man; The Redemption of Man; and The Gratitude Due from Man.

Olevianus’ Exposition of the Apostles’ Creed is a collection of sermons he preached on the basic articles of the Christian faith. It serves as a reminder that the Reformed tradition did not see itself as separate from the universal church, though it was principally opposed to Rome. Rather, Olevianus and his tradition argue for a Reformed catholicity rooted in the ancient confession of the church. This new translation by Lyle D. Bierma, along with R. Scott Clark’s historical introduction, will benefit both scholarly and general readers.

In the introduction, Caspar Olevianus noted that he wrote A Firm Foundation to “Christians experiencing a variety of afflictions and trials” as an “explanation of the Articles of the Christian Faith.” Originally published as an independent treatise, A Firm Foundation provides an interpretive tool on parallel portions of the Heidelberg Catechism, covering the Lord’s Days 5 through 24 in the catechism.

Study the thought and legacy of the Reformation with the Texts and Studies in Reformation and Post-Reformation Thought series. Featuring a mix of primary source documents—including Calvin’s The Bondage and Liberation of the Will—and monographs from the world’s leading Reformation scholars, each book in this series examines an essential aspect of Reformation and post-Reformation era theology.

Creeds, Confessions, and Declarations are all central documents for the Christian faith. Intended for distilling the essential beliefs of Christianity, for education, and spiritual practice, these historic documents of the Christian Church open up insight into the tradition and Orthodox teachings of Christianity. Imagine studying Romans 6—and then seeing if it came up at the Council of Nicea, Trent, or the Synod of Dort. Imagine seeing how the Augsburg Confession, the Arminian Confession, and the Schleitheim Confession use 1 Peter 5. And then imagine Luther’s Catechism, the Heidelberg Catechism, the Westminster Catechism, and the Orthodox Catechism all showing you their use of Genesis 2.

Das Anliegen dieser Textsammlung ist es, dem Leser wichtige christliche Glaubensbekenntnisse und Bekenntnisschriften des Protestantismus in deutscher Sprache einfach zugänglich zu machen. Die Auswahl der Texte folgt pragmatischen Gesichtspunkten und will einer möglichst breiten konfessionellen Leserschaft aus Landes- und Freikirchen dienlich sein.

The Reformed Portfolio library makes your study of the Bible easier by connecting your entire library of books to a robust set of study tools. The Reformed Portfolio Library takes everything in the Reformed Diamond Library and adds even more to your library. The Reformed Portfolio LIbrary contains key sets including Tyndale Commentaries | TOTC/TNTC (47 vols.), Barth’s Church Dogmatics (31 vols.), The Works of Jonathan Edwards (41 vols.), Pillar New Testament Commentary | PNTC (17 vols.), and many more. The Reformed Portfolio Library is excellent for academic research or advanced exegesis.

Our largest package, the 2025 Ultimate Library, provides an incredible library for biblical research and theological reflection. Whether focused on Church history or biblical exegesis, the vast collection of resources and titles at your fingertips cover the gamut—from most devotionals to practical discussions of pastoral ministry to the most rigorous scholarly and academic research. This package has everything you need to engage in the serious study of Scripture and its world, with respected resources like the Library of Hebrew Bible/Old Testament Studies | LHBOTS (382 vols.) and top-tier exegetical commentaries like the New International Commentary on the Old and New Testament | NIC (51 vols.).

The Reformed Diamond Library makes your study of the Bible easier by connecting your entire library of books to a robust set of study tools. The Reformed Diamond Library takes everything in the Reformed Platinum Library and adds even more to your library, with scholarly series like Wiley Blackwell Bible Commentaries | WBBC: Old and New Testament (22 vols.), The IVP Bible Dictionaries (8 vols.), UBS Handbooks Series: Old Testament, New Testament, and Deuterocanonical Books (66 vols.), and New Growth Press Minibook Collection (157 vols.). With over 2200 volumes of advanced biblical reference works, this is an ideal package for anyone doing academic research or advanced exegesis.

The Orthodox Portfolio library makes your study of the Bible easier by connecting your entire library of books to a robust set of study tools. The Orthodox Portfolio Library takes everything in the Orthodox Diamond Library and adds even more to your library. The Orthodox Portfolio LIbrary contains key sets including Fathers of the Church: A New Translation (148 vols.), Theological Dictionary of the Old Testament | TDOT (17 vols.), T&T Clark Jewish and Christian Texts Series (13 vols.), Berit Olam: Studies in Hebrew Narrative & Poetry (15 vols.), and many more. The Orthodox Portfolio Library is excellent for academic research or advanced exegesis.

This far reaching collection includes many of the premiere resources available for biblical study, theology, ministry, history, and more. These resources from Baker Publishing Group feature stand alone volumes as well as dedicated series, with contributions from leading scholars such as Douglas Moo, D.A. Carson, Darrell Bock, Peter Leithart, Thomas Schreiner, and many more. With these resources from trusted guides you will discover new and challenging insights as you dig even deeper in your studies.