He has authored a book on the difference in Paul between the old covenant and the new covenant, entitled"The End of the Law: Mosaic Covenant in Pauline Theology"(B & H Academic, 2009), contributed the chapter on the prison epistles in "The Cradle, the Cross, and the Crown: An Introduction to the New Testament" (B & H Academic, 2009), and is presently writing a biblical and practical theology of preaching (Crossway).