Willa Robbins is a master tracker working to reintroduce the Mexican wolf, North America's most endangered mammal, to the American Southwest. But when Colorado police recruit her to find her own brother, Zeb, a confessed murderer, she knows skill alone will not sustain her. Willa is thrown back into the past, surfacing memories of a childhood full of intense love, desperate mistakes, and gentle remorse. Trekking through exquisite New Mexico and Colorado...