Cheryl Strayed, like many, found in an opiate a temporary patch for life’s wretched emotional churning. Thankfully, she didn’t dance with it long enough to become physically or psychologically addicted. Instead, she sought out a different cure: solitude and physical pain on the Pacific Crest Trail. 17 years later, she published a memoir about that experience brimming with insights about memory, love, and wrestling with the self.