Roger R. Keller is a professor of religion at Brigham Young University (BYU). Keller is a convert to the Church of Jesus Christ of Latter-day Saints (LDS Church) having been at times both a Presbyterian and a Methodist Minister prior to joining the LDS Church.Keller earned a Ph.D. in religion from Duke University in 1975. Keller served as a Russian linguist for U.S. military intelligence. Besides being a Presbyterian minister he was also a chaplain at a Presbyterian College.Keller was one of the co-editors with Spencer J. Palmer of The Gospel and World Religions. He also wrote Book of Mormon Authors: Their Words and Messages.