An interesting commentary type book, applying the lens of "Social Identity Theory" to 1 Corinthians. It took some time (through a few classes and books) to get a solid grasp on the concept of Social Identity Theory and how it can apply to the New Testament, but I've come to really appreciate the ideas Tucker presents, and it definitely colors the way I now read scripture and think about the church.
If you were curious about SIT and the Bible, I would first recommend Tucker's "All Together Different" as a great overview. "You Belong To Christ" is a deep, deep analysis of these ideas, but be prepared for very "academic" writing. Or, best of all, take a class with Dr. Tucker; he's a fantastic instructor.