In 1916, author Bradley Johnson's great-great-grandfather built a quaint log-cabin in Wyoming's Bighorn Mountains. The cabin and nearby trout stream provided refuge during a poverty-filled childhood; but now, this sanctuary is increasingly at risk.

Growing-up poor, but living rich, Bradley shares the personal history that made him realize the true value of our country’s natural resources. Throughout the western United States, native trout are struggling, and effectively protecting their habitat requires an ecosystem-spanning approach. The fate of apex predators like...