Reddit reviews Predestination and Justification: Two Theological Loci

I'll definitely check out John Paul II's stuff, any other authors or books you recommend I may check out, too.

I highly recommend Francis Turretin's Institutes of Elenctic Theology . This is perhaps the best multi-volume systematic theology defending Reformed Orthodoxy. Turretin engages with Catholic Theology extensively and offers Protestant answers to Catholic problems.

Anything by Peter Martyr Vermigli is worth reading, but especially check out his treatises on Predestination and Justification. Vermigli was a conservative Protestant reformer who was very familiar with Thomist philosophy and Scholastic theology. His best work was in Eucharistic theology.

Finally, I recommend Allen & Swain's Reformed Catholicity: The Promise of Retrieval For Theology And Biblical Interpretation for an interesting read. Modern Evangelical Christianity has strayed far away from the principles of the Reformation. Doctrines like Sola Scriptura have been perverted and maimed by Evangelicals until they no longer mean what the Reformers meant for them to be. Moreover, Evangelicals are known for "Tradition is bad" arguments wherein they flat reject Christian orthodoxy or the consensus of the Church. This book is a call for Evangelicals to engage with the Ecumenical Councils and Creeds, Patristic Theology, and Reformed Orthodoxy; viewing ourselves as being in continuity with the Great Tradition.