Andy Mark worked as a brakeman and conductor on the Western Pacific and Union Pacific Railroads for twenty-one years before going back to college. A graduate of CSU-Chico, he spent...lihat lebih banyakAndy Mark worked as a brakeman and conductor on the Western Pacific and Union Pacific Railroads for twenty-one years before going back to college. A graduate of CSU-Chico, he spent sixteen years as a statistical consultant and data analyst before retiring in 2013. He is the author of two published articles, as well as a book on local history titled The West Branch Mill of the Sierra Lumber Company. Andy enjoys hiking in the backcountry, and he and his wife, Jill, are longtime rock hounds.lihat lebih sedikit