Mark is an award-winning, nationally published author, historian and professional speaker with seven books and more than 800 articles in print. A prolific writer, Mark has received the Nevada State Press award five times. He is a popular lecturer and experienced field trip leader who has lived at North Lake Tahoe since 1978. He teaches Sierra Nevada history using entertaining stories, slide shows and informative tours. He has been a frequent guest on National Public Radio and has appeared as an expert consultant on CNN, The History Channel and The Weather Channel, as well as many historical documentaries.