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.
Berry Adventures in the Land of Canaan is a devotional work about Israel entering into the promised land as a parallel to our spiritual warfare towards our sanctification.
In Smeaton – The Doctrine of the Holy Spirit he examines historically what the Bible teaches about the Holy Spirit. This is an old classic work (1862). In the New Testament portion he looks at topics.
Biderwolf-A Help to the Study of the Holy Spirit surveys, names of the Spirit, advent, personality, deity, sealing by, anointing of, fruits, baptism of, filling of, emblems, resistance of the Spirit.
In Chuck Smith Person and Gift of the Holy Spirit, Smith focuses on the Holy Spirit living and working within the believer, as well as the person of the Holy Spirit.
Gaebelein, A.C. – Work of Christ Past, Present and Future. Gaebelein (Brethren) devotes an entire chapter to each one of these three.
Gaebelein, Arno C. – His Riches Our Riches is a short three chapter work on how Christ’s riches become our inheritance in our salvation through Christ.