I think it was when I got to the butterflies -- in that brief, beautiful image comprising life, death and technology -- that the hair on the back of my neck began to stand on end. All at once, the pleasure I took in reading was altered irrevocably. Before then I had never noticed, somehow, that stories were made not of ideas or exciting twists of plot but of language. And not merely of pretty words and neat turns of phrase, but of systems of imagery, strategies of metaphor.