When, in the late 1980s, residents of Boulder, Colorado, suddenly begin to see mountain lions in their yards, it becomes clear that the cats repopulated the land after decades of persecution. Here journalist David Baron traces the history of the mountain lion and chronicles Boulder's struggles to coexist with its new neighbors. A parable for our times, the book serves as a cautionary tale for countless communities now struggling to live with lions, wolves, bears, and other animals as rebounding wildlife spreads in toward America's cities, and as America's cities sprawl ever outward into wildlife habitat.