Buck Tilton, a leading wilderness medicine expert and Backpacker magazine columnist, is the author of Backcountry First Aid and Wilderness First Responder (both FalconGuides), as well as Knack Hiking and Backpacking and Knack Knots You Need. He teaches at Central Wyoming College. Stephen Gorman is a photographer and writer whose photo-essay books include The American Wilderness. His work has appeared in several Knack how-to books, including Knack Canoeing for Everyone and Knack Car Camping for Everyone, as well as Outside and Audubon. Eli Burakian, a freelance photographer previously contributed to Knack Dog Care & Training and Knack Chess for Everyone.