The stories in “Runaway” cast incidents in the lives of women and men in contemporary Montana in a glare of prairie daylight as they struggle with the weather, physical adversities, and the tatters of the myth of the West that shapes and often distorts their vision. Trying to break a horse to harness, learning to pilot a plane, surviving the metamorphosis of the West into the global village, comic and grim, Blew’s characters draw upon their inner toughness to form their tentative bonds with one another.