Jesus' Blood and Righteousness: Paul's Theology of Imputation., by Brian Vickers. (Brian Vickers is Assistant Professor of New Testament Interpretation at the Southern Baptist Seminary in Louisville, Kentucky. )
This is an excellent book that I am working through, full of fresh exegetical insights and theological rigor.
I found a review of this book at Reformation 21.
Here is another review; this time by Denny Burk.
This is to add to the list that I put together recently.
Louis pointed out that I should have had John Owen's work on this list. Yes, I need to read that also; and I am sure there are many others, like John Murray and James Buchanan and Francis Turretin and J. V. Fesko.
Justification: Understanding the Classic Reformed Doctrine, by J. V. Fesko