Mark Lee GardnerMark Lee Gardner is the author of To Hell on a Fast Horse, the story of Billy the Kid and Sheriff Pat Garrett. An authority on the American West, Gardner has appeared on PBS's American Experience, ABC's World News, the History Channel, Encore Western, NPR's All Things Considered, and BBC Radio. He has written for the Los Angeles Times, American Heritage, Wild West, American Cowboy, and New Mexico magazine. Gardner lives with his family in Cascade, Colorado. Read More Read Less