Gospel of the Comforter by Steele is a 36 chapter work on the Holy Spirit and different aspects of Him (1897).
The Carnal Mind by Harmon Allen Baldwin is a 30 chapter work on the carnal mind, defining terms, biblical view, what is evil, guilt, pollution, self-denial, oppositon to light, etc.
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.
Combs – The Filling of the Holy Spirit and Sanctification A Historical Perspective is a 27 page short work on the Filling of the Holy Spirit. 1 Chapter.
Arminius On The Sin Against the Holy Spirit is a single chapter work on this issue by James Arminius.
Timothy Lin work of the Fruit of the Spirit is a short 1 chapter work about the Holy Spirit and the fruit of his indwelling in the believer.
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.