We recently had the opportunity to interview Dr. R. Scott Clark with regard to the life  and theology of Casper Olevianus. One of the compilers of the Heidelberg Catechism, Olevianus made significant contributions to the covenant concept in Reformed theology. Reformation Heritage books has most recently published Lyle Bierma's translation of Olevianus' Exposition of the Apostle's Creed. This short work is extremely profitable for anyone seeking a substantive explanation of the Creed. It is full of Scriptural proofs and theological depth. You can listen to our interview with Clark here. For those who wish to learn more about these subjects, Dr. Clark's doctoral dissertation Casper Olevian and the Substance of the Covenant and Lyle Bierma's An Introduction to the Heidelberg Catechism and The Covenant Theology of Casper Olevianus are great resources.