I’ve written a bit about this before, but it’s hardly my main area of expertise.
Philip J. Long has written a very nice introductory series on the New Perspective on Paul. Here are the links:
Basics of the New Perspective –
- An Introduction
- What Was the Old Perspective?
- Judaism as a Religion of Grace
- Was Paul “Converted” to Christianity
- Works of Righteousness
- Justification
- Responses to the NPP
- Dispensationalism and the NPP
I link to this in detail because I think it is one of the best short introductions I’ve read, and it’s available right her in blog form. I am frequently asked for a short version of just what is the New Perspective on Paul. Now I have something easily available that I can recommend.