Greg Brick Ph.D. was employed as a hydrogeologist at several environmental consulting firms, at the Minnesota Department of Natural Resources, and has taught geology at local colleges and universities. He has edited the Journal of Spelean History for the past 20 years. He has published more than 200 articles about caves and was the recipient of the 2005 Cave History Award from the National Speleological Society. His first book, IOWA UNDERGROUND: A GUIDE TO THE STATE’S SUBTERRANEAN TREASURES, was published by Trails Media Group in 2004. His second book, SUBTERRANEAN TWIN CITIES, published by the University of Minnesota Press in 2009, won an award from the American Institute of Architects. His third book MINNESOTA CAVES: HISTORY AND LORE was published by Arcadia Press in 2017. His fourth book, MINNESOTA UNDERGROUND, was co-authored with Doris Green (2019). He served as co-editor of CAVES AND KARST OF THE UPPER MIDWEST, a textbook covering Minnesota, Wisconsin, Illinois, and Iowa (2021). His work has been featured in National Geographic Adventure magazine as well as on the History Channel. He has led guided tours of caves for the Minnesota Historical Society and the University of Minnesota College of Continuing Education.