There’s a vocal contingent of present-day adventurers who credit My Side of the Mountain with sparking a lifelong devotion to the outdoors. It’s the story of 12-year-old Sam Gribley, who runs away from home and builds a self-sufficient life in the wilds of the Catskill Mountains. He lives in a hollowed-out hemlock tree, captures and trains a falcon, makes pancakes out of acorns, and engages in other whimsical deeds that have captured the imaginations of generations of adventure-hungry kids.