“I have decided that the trouble with print is, it never changes its mind,” writes Ursula Le Guin in her introduction to Dancing at the Edge of the World. But she has, and here is the record of that change in the decade since the publication of her last nonfiction collection, The Language of the Night. And what a mind — strong, supple, disciplined, playful, ranging over the whole field of its concerns, from modern literature to menopause, from utopian thought to rodeos, with an eloquence, wit, and precision that makes for exhilarating reading.