Anna is the child of Mennonites from Mexico, who have come north to harvest fruit and vegetables. Sometimes she feels like a bird, flying north in the spring and south in the fall, sometimes like a jackrabbit in an abandoned burrow, since her family occupies an empty farmhouse near the fields, sometimes like a kitten, as she shares a bed with her sisters . . . But above all Anna wonders what it would be like to be a tree rooted deeply in the earth,...