Basic Christian Doctrine is an anonymous Doctrines book by a Calvinistic author. It has 50 topics/chapters, and does a good treatment on these topics even if it is a briefer treatment. Each chapter has 10 points with a paragraph or two of comments on each point. Lots of verses.
Systematic Theology
Nassi, Tzvi – Plurality in the Godhead
Nazzi Plurality in the Godhead, or How can three be one? is a work by a Jewish rabbi on the Trinity, on the plurality of God within the Godhead.
Plurality in the Godhead
or How Can Three Be One?
Rabbi Tzvi Nassi (CWH Pauli)
(1863)
How can they (the Three) be One? Are they verily One, because we call them One? How Three can be One, can only be known through the revelation of the Holy Spirit (Zohar II 43b)
Wallace Lew – Ben-Hur A Tale of the Christ
Wallace, Lew – Ben-Hur, A Tale of the Christ
Brooks Thomas – Touchstone of Sincerity
The Touchstone of Sincerity
by Thomas Brooks
The first great work which men are to attend to in this world—is the eternal safety and security of their souls. Their next great work is to know, to be assured—that it shall go well with their souls forever.
In this single chapter work by Brooks, he discusses sincerity and hypocrisy within the Christian’s life.