Dagg’s Work, Manual of Theology is a full fledged systematic theology from a Reformed perspective. He was Baptist.
Cox details the evidence for the doctrine of the Trinity in the Bible looking dozens of different angles.
Bartleman’s Deity of Christ is a 6 chapter work on various verses and resources and quotes on the Deity of Christ, and some items on the relationship in the Trinity.
In this 22 chapter doctrines book, Berkhof (Presbyterian and Reformed) looks at some typical systematic theology themes: Revelation, Scripture, Nature-Names-Attributes of God, the Trinity, Creation, Divine Decrees, Providence, Man, Sin, States and offices of Christ, Salvation and Sanctification.
Cole Biblical Theology of The New Testament is a 23 chapters work and is a biblical study on different NT theology topics
The Bible itself reveals those doctrines that are essential to the Christian faith. They are 1) the Deity of Christ, 2) Salvation by Grace, 3) Resurrection of Christ, 4) the gospel, and 5) monotheism. These are the doctrines the Bible says are necessary.
This small article could very well determine whether you are in or out of the Christian Faith
Litmus Test: You have to believe items 1-5 to be in the Christian Faith.
Thomas Watson Body of Practical Divinity is a set of sermons on different doctrinal topics of the Westminster Catechism.