Greg McDonnell is the author of 10 books on a wide range of transport subjects and a professional photojournalist for railroad publications in the United States and Canada. He received the Railway and Locomotive Historical Society's Fred A. and Jane R. Stindt Photography Award for significant contribution to the photographic interpretation of North America's railroading history. Jerry A. Pinkepank is the author of the original Diesel Spotter's Guide and founder of the diesel locomotive news magazine Extra 2200 South.