After encountering mountain lion tracks near her home outside Yellowstone National Park, Leslie Patten began a journey to learn above these elusive, unseen animals by collecting anecdotal information and then interviewing biologists, professional trackers, houndsmen, and conservationists.

After encountering mountain lion tracks near her home outside Yellowstone National Park, Leslie Patten began a journey to learn above these elusive, unseen animals by collecting anecdotal information and then interviewing biologists, professional trackers, houndsmen, and conservationists.