H. Roger Grant, chair and professor of history at Clemson University, has published twenty books, a dozen of which are on transportation topics. Clarence Wunderlin is the editor of the Ohio Bicentennial Series and is an associate professor of history at Kent State University.
Don Hofsommer is a professor of history at St. Cloud State University. He is the author of many books on railroad history, including The Tootin’ Louie: A History of the Minneapolis & St. Louis Railway, The Great Northern Railway: A History, The Hook & Eye: A History of the Iowa Central Railway, and Minneapolis and the Age of Railways, all published by the University of Minnesota Press.