Peter Gantriis is founder and president of RPM Research, LLC, a market research and consulting firm that works with the world's leading automotive and powersports manufacturers. He is an avid motorcycle enthusiast and the author of Motorbooks’ The Art of BMW. Peter lives in Mahtomedi, Minnesota.
Greg Field has written a number of books on the subject of motorcycles, including several volumes dealing with Harley-Davidson. His latest book is Original Harley-Davidson Knucklehead (Motorbooks: 2003).
Doug Mitchel picked up his first camera while in high school. It has been more than 3 decades since that day and since then he has published than 30 books. The bulk of his efforts are in the field of transportation, which is his first love. Doug lives in Creve Coeur, IL.