pTwice declared extinct, North America's most endangered mammal species, the black-footed ferret BFF, is making a comeback thanks to an evolving conservation regimen at more than thirty reintroduction sites across the continent. Lawrence Lenhart lingers at one such site in his proverbial backyard, the Aubrey Valley in northern Arizona. He clocks hundreds of hours behind the wheel, rolling over ranch ruts as he shines a spotlight over dusky sage steppe in the hopes of catching a fleck of emerald eyeshine. pThe beguiling weasel at the center of this book is more than a charismatic minifauna it is the covert ambassador of a critical ecosystem that has dwindled to 1 percent of its former size. In a landscape menaced by habitat fragmentation, bacterial plague, settler colonialism, and soil death, a ferret must be resilient. Lenhart investigates the human efforts to sustain the species through monitoring, vaccination, captive breeding, and even cloning. pLenhart balances this lens of environ