When any discussion or debate comes up about vital Christian doctrines it is often a great opportunity to get book and article suggestions for further study on the topic.
Dr. Mark Jones has done just such a service for us by producing an annotated bibliography for what to read next if one is wanting to read more about the Christian doctrine of the trinity.
Find Dr. Mark Jones’ annotated bibliography here.
In addition to this, I have put all of his recommendations together into an organized list on Amazon for your convenience.
Find the recommended books on what to read next about the Trinity on Amazon here.
The Old Guys 
Haven’t heard from you guys in a while, thanks for the info! I’ve been dealing with one person in particular, who has a blog, who denies the Trinity, and MANY other essential Christian doctrines. [â¹] I have been using sources that I own, like Dr. White’s ‘The Forgotten Trinity,’ and articles from Ligonier.org. Thank you for adding to my sources when dealing with ignorant people stubborn people like this guy I’ve been dealing with!
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In spite of the gloss of the 17th C, I believe Robert Letham’s book is very good. He especially touches on some of the modern EO, Bulgakov and Lossky. The Essence and the Energies of God simply must be seen! As too the Economy of God, though we always must beware that a form of Apophaticism can lead towards agnosticism also. But without the EO we in the West are losers in the Trinitarian Doctrine!
*Two books that are must reads in my opinion are, The Trinitarian Faith, etc. of T.F. Torrance, and the little Catholic book: The Trinity, by Karl Rahner.
Btw too, any historical & theological study of the Trinity surely must include Origen (Origenes Adamantius, c. 185 – c. 254)) Greek Father of the Church and Alexandrian theologian. He with Tertullian (160/70 – 215-20, “Father of Latin Theology” and African Church Father) were some of the first theolog’s to seek to elucidate this great doctrine and mystery/mysterion. And Paul uses the word “mysterion” in a real comprehensive way in 1 Cor. 4: 1. See also Tertullian’s: Against Praxeas, indeed a personal polemical on the Trinity! Note, Terullian was a Millennialist also. And surely his terminology provided the base for the Trinitarianism and Christological ideas for centuries!
Btw also, let me share one of my favorite Trinitarian quotes: “The dogma of the Holy Trinity consists in two basic postulates. The first affirms the triune character of the Deity, Trinity in Unity and Unity in Trinity. The Father, the Son and the Holy Spirit, who are three distinct Divine Persons together constitute one God. The second postulate is concerned with the consubstantiality of the Holy Trinity, which has but one Substance or Nature.” (Fr. Sergius Bulgakov ‘ Sophia the Wisdom of God’ p. 23).”
And finally this gem of a statement by Bulgakov: “The dogma of consubstantiality, which safeguards the unity of the Holy Trinity, this remains a sealed book so far as we are concerned — for in a religious sense it is neither assimilated nor unfolded.”