A History of Christianity in Pittsburgh (new book) ... GUEST Gary Scott Smith ... for 39 yrs, Dr Smith taught at Grove City College, where he chaired the History Department and coordinated the Humanities Core ... He earned his MDiv at Gordon-Conwell Theo Sem & his PhD in history at Johns Hopkins Univ ... He is the author or editor of 13 books, including “Faith and the Presidency: From George Washington to George W. Bush,” “Heaven in the American Imagination,” “Religion in the Oval Office: The Religious Lives of American Presidents” ... Smith is an ordained minister and co-director of the mission program and parish associate at Saint Andrews-Covenant Presbyterian Church, Wilmington, PA