Daniel Edwin Barker is an American atheist activist and musician who served as an evangelical Christian preacher and composer for 19 years but left Christianity in 1984. He and his wife Annie Laurie Gaylor are the current co-presidents of the Freedom From Religion Foundation. He has written numerous articles the organization's newspaper Freethought Today. He is the author of several books including Losing Faith in Faith: From Preacher to Atheist. Barker has been an invited speaker at Rock Beyond Belief. He is on the speakers bureau of the Secular Student Alliance.