Doctrine of the Covenant of Redemption According to John Gill (1697-1771)

What is the doctrine of the covenant of redemption? Why does John Gill (1697-1771), an English Baptist pastor and theologian, regard this doctrine as the kernel in his systematic theology? This book explicates how core theological doctrines in the Bible, e.g., the doctrine of God the Trinity, Christology, and soteriology, are integrated in the doctrine of the covenant of redemption from the biblic...