Tom Schreiner, professor of NT at Southern Seminary was interviewed recently on the issue of justification. This was a major doctrinal difference during the Reformation between Rome and the Protestants. Many of the recent converts to Catholicism from evangelical philosophical circles have cited a resolvable doctrine of justification as one of the things that permitted them to leave to Rome.
The new perspective on Paul, early Judaism (Covenantal Nomism), and justification has contributed to this conversation. There is a brief introduction to the New Perspective at the Resurgence. I just finished listening to this and found it a helpful introduction. There are notes and the audio available.
This is a very important doctrine as it strikes to the heart of the biblical gospel - how are sinful human beings made righteous before God.