There is a new an exciting pre-pub full of must-get books on Paul .... http://www.logos.com/products/prepub/details/6290
It includes the infamous "Paul and Palestinian Judaism" by E.P. Sanders, and the "Paul: Fresh Perspectives" book by the notorious (in some circles) Bishop N.T. Wright. These books will introduce you to some of the most important pro- "New Perspective on Paul" writings. Even if one disagrees with the New Perspective, one can't ignore it. Seyoon Kim in one book has called the NPP one of the most influentials schools of thought on Paul (surpassing even the Bultmanian school), and the most signficant since the Reformation. These are the writers (and these are a couple of the books) that you will need to understand and answer (or accept).
Personally, I so want these books searchable in Logos that I am keen to draw everyone's attention to this collection. Let's hope it doesn't sit in pre-pub land for long.