In Covenant Theology, author Jeong Koo Jeon makes a much-needed contribution to 21st century biblical and systematic theology. He explores the debate between John Murray and Meredith G. Kline, placing their ideas in the larger context of Biblical studies that have had a direct influence on Reformed theology and evangelicalism. Although the theologies of Murray and Kline contain significant differences, they both maintain a distinction between a covenant of creation and a covenant of grace. In addition, they both advocate a fundamental antithesis between law and gospel, giving a priority to law over gospel in the temporal and logical order of divine works. Jeon sees these distinctions as hermeneutic tools that are essential for better understanding of biblical revelation as well as faith, grace, and atonement.

Karl Barth and John Calvin belong to the first rank of great theologians of the church. Both, of course, were also reformed theologians. Historically, Calvins influence on reformed doctrine has been much greater than that of Barths and continues to be so in the present day. In contrast, Barths reformed credentials have been questionednot least in his understanding of election and atonement. The question is who should be of greater importance for the reformed church in the twentyfirst century? Who has the better arguments on the Bible? Barth or Calvin? Doctrinal areas of focus are the nature of the atonement, Scripture and the sacraments.