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
In this 25 chapter work, Pink examines God (Godhead) looking at his solitariness, his knowledge, his foreknowledge, his supremacy, his sovereignty, his immutability, his holiness, his power, his faithfulness, his goodness, his patience, his grace, his mercy, his loving-kindness, the love of God, the wrath of God, the gifts of God, the bounties of God, the guidance of God, the blessings of God, the curses of God, and the decrees of God among others.
This module, on Creation and the Existence of God is taken from theHighway.com. It has 16 studies related to Crecreaation basically.
The Goings of God by Austin-Sparks is a work about the person of God.