Prof. Koons from the University of Texas comes to the Evenings of Recollection from time to time. He has published a book: "A Lutheran's case for Roman Catholicism". Here are some podcasts from his book:

https://lnkd.in/eQcJQqb (Focuses on justification)

https://lnkd.in/efNu73R (Focuses on authority/unity)