Martin Luther is best known for posting the 95 Theses in 1517, in which he argues that indulgences are not acts of penance that can replace true repentance. His stance on the Word and his faith made him one of the key figures of the Reformation. Throughout his life, he wrote numerous letters to family, friends, and the leaders of the day. This collection features a selection of his correspondence—to popes and princes, reformers and humanists, his wife and acquaintances. The range of these letters give us a better understanding of who Luther was and provide a glimpse into a lesser-known side of his life.

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.).

This volume features Georgiana Malcolm’s careful translation of Karl Zimmerman’s collection of Luther’s correspondence with women. Featuring Luther’s letters to his wife Katherine and female acquaintances, this correspondence is a window into Luther’s character, as well as the fifteenth-century Europe.

The Classic Scholarship Collection includes more than twelve hundred works from the most trusted Christian authors and teachers of all time: Augustine, John Chrysostom, Aquinas, Charles Spurgeon, John Wesley, John Calvin, and more. With resources in original language tools, commentaries, catechisms, histories, systematic theologies, dictionaries and more, you'll have the tools for both in-depth and broad study of Scripture, systematic theology, historical theology, Biblical studies, and much more.

The Lutheran Portfolio library makes your study of the Bible easier by connecting your entire library of books to a robust set of study tools. The Lutheran Portfolio Library takes everything in the Lutheran Diamond Library and adds even more to your library. The Lutheran Portfolio LIbrary contains key sets including Anchor Yale Bible Dictionary | AYBD (6 vols.), Stuttgart Scholarly Editions: Core Bundle, Anchor Yale Bible Commentary | AYBC (94 vols.), UBS Handbooks Series: Old Testament, New Testament, and Deuterocanonical Books (66 vols.), and many more. The Lutheran Portfolio Library is excellent for academic research or advanced exegesis.

The Lutheran Diamond Library makes your study of the Bible easier by connecting your entire library of books to a robust set of study tools. The Lutheran Diamond Library takes everything in the Lutheran Platinum Library and adds even more to your library, with scholarly series like Ancient Christian Commentary on Scripture Complete Set | ACCS (29 vols.), Popular Patristics Series Collection (58 vols.), The Preacher's Commentary Series | TPC (35 vols.), and Spectrum Multiview Book Series (27 vols.). With over 1675 volumes of advanced biblical reference works, this is an ideal package for anyone doing academic research or advanced exegesis.