"It won't matter whether or not you've attempted an ultra, or whether or not you even dream of one. If you enjoy running and reading, you'll want this book."--David Meyers, Running Journal The best writers in the sport of running describe the last frontier of long-distance events: races longer than a marathon. James Shapiro begins by relating with heart-rending detail his experiences in a six-day race in "Swifts on the Wing."...