
Relentless Forward Progress: A Guide to Running Ultramarathons


Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond
amazon.com
Born to Run: The hidden tribe, the ultra-runners, and the greatest race the world has never seen
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Run for Your Life: How to Run, Walk, and Move Without Pain or Injury and Achieve a Sense of Well-Being and Joy
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