Thomas, Frank a.: - Frank A. Thomas, PhD, serves as the Director of the PhD Program in African American Preaching and Sacred Rhetoric and the Nettie Sweeney and Hugh Th. Miller Professor of Homiletics at Christian Theological Seminary, Indianapolis, Indiana. Thomas is the author of How to Preach a Dangerous Sermon and Introduction to the Practice of African American Preaching, released by Abingdon Press respectively, February, 2018 and November 2016.