Geerhardus Vos, one of the modern innovators in the field of Biblical Theology, wrote Biblical Theology: Old and New Testaments at the end of his life, completing it in 1948. He wrote the book to examine the “history of Special Revelation” in an attempt to trace the development of the key truths found throughout the Old and New Testaments. In so doing, Vos essentially develops a Biblical Theology.

Vos defines "Biblical Theology as that branch of Exegetical Theology which deals with the process of the self-revelation of God deposited in the Bible." The idea is that revelation itself is a divine activity, not just the product of divine activity, meaning that God has purposed the Bible to reveal His plan and process of redemption. Additionally, because God is working within the context of human history, the Bible is not only a religious document, but also an historical one, chronicling the history of redemption.

In his book, Vos proposes and utilizes certain exegetical methods towards understanding the Old and New testaments as a continuous history of God's redemptive work. In particular, Vos' analysis of the Fall, the Kingdom of God, and numerous other themes or threads found throughout the Bible demonstrate the insights which the redemptive-historical method offers. Although most of his analysis on numerous topics is relatively short, the depth and breadth Biblical Theology's potential is surveyed.

For those interested in the subject of Biblical Theology, whether as an example of applied exegetical methods or as an alternative or supplement to Systematic Theology, Biblical Theology: Old and New Testaments offers a foundation to this relatively new but developing field of theological study.