If you don’t know who Michael Gorman is, then you clearly haven’t kept abreast of NT studies. Gorman is a Pauline scholar, who makes the odd forays in Johannine literature, and he is always worth reading. His Apostle of the Crucified Lord is an excellent intro to Paul’s letters which I still use (and a second edition is forthcoming).
Thankfully Wipf & Stock has a great video where you get to meet and learn about Michael Gorman.