Cox details the evidence for the doctrine of the Trinity in the Bible looking dozens of different angles.
In this very short 2 chapter work, Austin-Sparks (Deeper Life) presents us with the “horizoned by glory”. To be horizoned by something is to be completely overwhelmed by it.
Anon Basic Christian Doctrine is a 50 Chapter doctrines book that is anonymous.
Robert Shaw’s short 1 chapter work on God and the Holy Trinity is an excellent collection of observations and verses that defend the Trinity.
Henry Orton Wiley’s 3 vol Christian Theology work has 40+ chapters on the different areas of theology, such as, Bibliology, Theology Proper, etc.
A doctrinal book Body of Doctrinal Divinity is a set of 7 doctrinal books by Reformed John Gill.
The Attributes of God By Don Fortner