This is the 3rd volume in the Reformed Apprentice workbook series, teaching Reformed Theology in a simple but interactive manner. It covers the Doctrine of God and the biblical teaching of the Trinity. Its main purpose is to come into a deeper relationship with the Lord Jesus Christ as he has revealed himself to the church in his Word and by his Spirit through the centuries in Reformed Theology. The workbook extensively quotes the early church fathers, the Reformers, the Puritans, and Reformed theologians from various ages in order to aid the Reformed Apprentice in understanding how the Bible teaches us about who God is and what God has done. It covers God's divine attributes, the Trinity, the divinity of the Son, the divinity of the Holy Spirit and the decrees of God. There is nothing like this series of interactive workbooks anywhere in the Reformed community. A workbook of this kind was created to engage the student of Scripture to be apprenticed under the historical teachers of Reformed Theology.