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.
Anderson Silence of God theodicy is about when God is silent, the silence of God, which in theology it is theodicy. Why doesn’t God immediately vindicate his children.
Winslow in Christ and the Christian in Temptation examines how Satan tricks the Christian into falling into sinful conduct. These elements are the keys by which Satan tricks us.
Corlett in his book Baptism with the Holy Ghost or Baptism with the Holy Spirit looks at various important points in the biblical narrative on the subject. The Need, God’s desire to possess His temple, death to the flesh, enduement with power, etc.
Dr John R Rice’s small book on new converts, setting out the steps he sees as good for them. Assurance of Salvation, Baptism, Young Children, Prayer Life, and Giving and Soul-Winning (Evangelism).
The Guided life by George Body is a shorter 5 chapter work looking at the Holy Spirit guiding us by the way of contrition, then Sanctity, then Ministry, and finally by the way of Patience.
Winslow, Octavius – The Fulness Of Christ is a 15 chapter work on how Christ fills us with his power and character. This is through the Holy Spirit.