Jim Rada, a former University of Wisconsin professor, was considered by many to be a foremost expert on Northwoods whitewater kayaking. For 23 years, he paddled and painstakingly researched kayak-navigable rivers across North America and has been credited with the first descents of many rivers. Doug Nelson is a professional outdoor photographer, whose work has appeared in numerous national and regional publications. He lives in St. Paul, Minnesota.
BENJAMIN A. PIERCE is Associate Professor of Biology at Baylor University, a researcher in population genetics, and a widely published author of articles on population genetics in scientific journals.