Given the vast scope of the subject in hand, Renihan does a masterful job of giving us a clear tour through the various covenants by which God has related to humanity. The result is not only a richer appreciation of who Christ is, the unity of God's purposes and how the gospel is the fulfilment of the plan of redemption; it is also a deeper understanding of the church, baptism, and the scriptures, and a deeper longing to worship the triune God who brought his sovereign plan to pass for his own glory.

The Mystery of Christ is well-written, displays ample knowledge of issues discussed concerning covenant theology by Baptists and paedobaptists, grounds its arguments in scriptural exegesis and theology, recovers old arguments for a new day, presents a cohesive map of the covenants of Scripture, and exalts our Lord Jesus Christ, the last Adam, throughout.

One of the most useful things Renihan does, which readers across the Reformed spectrum should appreciate, is keep covenant and kingdom together. Not as independent themes, but as themes that absolutely depend on one another. While I am in no position to say how confessional Reformed Baptists should regard Renihan's work, I know that I, as a Presbyterian theologian, will from now on look to his book as a prime resource for Reformed Baptist covenant theology.