I’ve added a link to this Brief Introduction to Trinitarian Theology to the Reading That Might Be Good For Ya links.
It is a well done summation of the catholic gospel, and so will seem novel to those in the Federal/Scholastic Calvinist tradition. Lutherans and those in the Evangelical Calvinist traditions of reformational Anglicanism, Scottish Theology and Calvin himself will find much that is familiar.
Of course those in the East will simply see Athanasius.
Give it a read. Its truly good news!