Sandberg Messages from the Risen Savior to the Seven Churches is about the messages of God to the Seven Churches in the first part of Revelation.
Sanderson Words of Comfort for those in Bereavement is about when somebody loses a close person to death and God’s comfort for them.
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.
“In the darkest hour the universe has ever seen, Jesus of Nazareth was King! I cannot be content with the acknowledgment that He is going to be King by and by. It is true that in a larger and fuller sense His Kingship shall be manifested, but He is even now the King. Yes, He is King now. He is seated on the right hand of the Majesty on high; all authority is His in Heaven and on earth. He is the King.”
In Simpson Holy Spirit Vol 1 Simpson (M&CA) presents symbols of the Holy Spirit and some studies of the Holy in some books (Judges, Proverbs, Joel, Isaiah, Ezekiel, Jeremiah, etc).
Shelton-Work of the Holy Spirit in our Salvation is a single chapter work in which LR Shelton presents the Spirit’s work in our Salvation.
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.