Despite her success setting a self-supported Fastest Known Time record on the Pacific Crest Trail in 2013, Heather "Anish" Anderson still had such deep-seated insecurities that she became convinced her feat had been a fluke. So two years later she set out again, this time hiking through mud, rocks, and mountain blazes to crush her constant self-doubt and seek the true source of her strength and purpose. The 2,180 miles of the Appalachian Trail,...