Peter Gantriis is founder and president of RPM Research, LLC, a market research and consulting firm that works with the worlds leading automotive and powersports manufacturers. Peter has an MBA from the University of Minnesota and is an avid motorcycle and car enthusiast. He lives near St. Paul, Minnesota, with his wife and three children. When hes not using his free time writing for Motorbooks, Peter enjoys boating, skiing, and investing in slow racehorses. Official Website: www.motorcyclemarketresearch.comOn Twitter: @rpm_researchHENRY VON WARTENBERG is a freelance photographer from Buenos Aires, Argentina, whose work has appeared in many books and magazines, such as National Geographic Adventures.