Romans is a personal book for the author. As a child, he suffered from a bed-ridden illness. His grandmother gave him the Bible to read and it was in Paul’s letter to the Romans when the Holy Spirit began to deal directly with him. Custer has studied Romans from the Greek Testament and has preached through Romans in church and taught it in seminary classes. In the Introduction, the author discusses Paul’s background and the letter’s purpose, setting, and main theme. Custer’s commentary emphasizes the doctrine of God, the names and doctrine of Christ, and the doctrine of the Holy Spirit. He also covers salvation, the church, sanctification, sin, the law, service, eschatology, and inspiration.