This past week I came across a series of video conversations between Carson, Piper and Keller on the Gospel Coalition website (I'm not sure when they originally were posted). There are ten "chapters" in all:
Chapter 1: Gospel Centered Mercy Ministry vs. The Social Gospel
Chapter 2: What do you look for in a pastoral candidate?
Chapter 3: The importance of continuing mentorship of the pastoral staff?
Chapter 4: What is Gospel-centered and why do you preach against legalism to evangelize libertines?
Chapter 5: How does the gospel and gospel centeredness work to sanctify believers?
Chapter 6: How does the gospel-centered approach work to help a guy conquer the sin of pornography?
Chapter 8: Why does God appear so stuck on himself? Does this reflect moral weakness in God?
Chapter 10: John Piper's Closing Prayer
Of these ten, I found chapters 1, 5, 7, and 9 to be most helpful. But if you can only watch one, I would recommend chapter 9, where Piper and Keller interact on how "God-centered" and "gospel-centered" connect. In the course of this interaction, Piper admits that his language of being "God-centered" at times has not been "Christ-centered" enough. But Keller also admits that in his emphasis on being "gospel-centered" that his language could be misunderstood to be strictly cognitive rather than penetrating to the affections. To whet your appetite, here is a snippet of Piper that captures it well:
"The apex of the glory of God is seen in Christ, and the apex of His glory is seen in the cross, and therefore to be God-centered leads to Christ-centered leads to cross-centered."

This past week I acquired a work of Jonathan Edwards that I have had on my radar for some time: The History of the Work of Redemption. It originated as a series of 30 sermons that he preached between May-August 1739. His goal in preaching the series was to trace God's work of redemption from the Fall all the way through to the consummation. In other words, it was similar to a biblical theology organized around tracing the storyline of Scripture. He chose as his keynote text Isaiah 51:8

