In a singular first children's book, Pulitzer Prize-winning poet Ted Kooser follows a plastic bag on its capricious journey from a landfill into a series of townspeople's lives. One cold morning in early spring, a bulldozer pushes a pile of garbage around a landfill and uncovers an empty plastic bag -- a perfectly good bag, the color of the skin of a yellow onion, with two holes for handles -- that someone has thrown away. Just then,...