Immigrants lost in the blistering expanse of the Sonoran Desert, problem bears, bats pollinating saguaros, a Good Samaritan filling tanks at emergency water stations, and the terrified runaway boy who shoots him pierce the heart and mind of Rosana Derais. "Vanishings," the first story in Silence and Song, is a love letter, a prayer to these strangers whose lives penetrate and transform Rosana's own sorrow. In "Translations," the prose...