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.
Evangelical Tracts of J.C. Ryle wrote well over two hundred evangelical tracts, of which more than two million were circulated, and many were translated into foreign languages. Throughout his ministry, he remained one of the strongest defenders of the evangelical reformed faith within the Church of England. His faithful witness to the Gospel of Christ needs to be heard more than ever today. The following selection of tracts are classics of Gospel Truth that readers came to expect from all his writings. His tracts are.
Another Gordon Quiet Talks series about those who win against the world, and winning forces, Jesus, Holy Spirit, etc.
Teasley Holy Spirit and Other Spirits is about the Holy Spirit’s effect on the believer as wells as how other spirits (demons) try to affect mankind with specific unholy spirits.
Arminius On The Sin Against the Holy Spirit is a single chapter work on this issue by James Arminius.
In Epp-Bible Answers to Your Questions a 66 page booklet, Epp answers various questions on different Bible issues.
Steele – Love Enthroned is a work on what is love, its different aspects, biblical examples, etc. 23 chs.