In this book, Wing Yi Au investigates Paul's different ways of characterizing "God" in Romans. By comparing and contrasting Paul's designations with his Jewish and pagan contemporaries, the author argues that Paul creatively reinterprets and adapts the socio-linguistic resources of divine epithets to justify the incorporation of Gentiles. It is found that Paul's divine designations in the letter trace God's essential salvific activities. For Paul, the God of Israel, especially in the Old Testament and Romans, never falters in fulfilling his role as the Father, redeemer, justifier, reviver, mercy-giver, and warrior who creates, rescues, and restores his people. Meanwhile, Paul's designations put special emphasis on the inclusion of Gentiles in God's plan of salvation.