Special Treatises on Controversies of Faith - Volume I - Adrian and Peter of Waldenburg

Special Treatises on Controversies of Faith, Volume I by Adrian and Peter van Walenburch is the first volume of their collected Tractatus Speciales, establishing the fundamental principles underlying all Catholic-Protestant controversy. Drawing on Sacred Scripture, the Fathers of the Church, and ecclesiastical Tradition, it lays the methodological groundwork upon which the more specific treatises of Volume II rest.

The volume's central concern is the Rule of Faith — defending the Catholic reliance on both Scripture and Tradition against the Protestant principle of Sola Scriptura. It treats theological certainty, implicit and explicit faith, the proper method for resolving doctrinal disputes, and the categorization and refutation of heresy, among many other topics. Throughout, the brothers engage Protestant confessional principles directly and methodically, grounding every argument in Scripture, patristic testimony, and the continuous teaching of the Church.

Overall, the volume stands as a rigorous methodological foundation for Catholic controversial theology, representing the brothers' lifelong apostolate of controversy in the post-Tridentine period.