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Ultramarathons don't leave much room for mistakes. Don't learn the hard way: Get a jump on training for an ultramarathon with Hal Koerner's Field Guide to Ultrarunning, a comprehensive handbook to running 30 to 100 miles and beyond, authored by one of the most experienced and recognized athletes in the sport.

Ultramarathon Man helped introduce the world to ultramarathoning. Now, after three decades of running ultramarathons across the globe, Dean Karnazes is still going strong. This updated and revised edition includes an afterword full of the lessons he’s picked up along the way. He gives personal details on the essential pillars of health—fitness, diet, and sleep. What does he eat, what supplements does he take, and what kind of mattress does he sleep on? Aging well takes work, and the man who hasn’t stopped is sharing the tips and learnings that have kept him going.