Liftin, Duane. *Paul's Theology of Preaching: The Apostle's Challenge to the Art of Persuasion in Ancient Corinth.* rev. & exp. (Grand Rapids: IVP Academic, 2015).
This is becoming a common textbook in homiletics. To be honest, I'm kind of surprised it's not available yet. Would be a good addition to the homiletic resources in Logos.
