Eco-fantasy: Duncan Harper, author of Witch of the Fall, talks about his world, Acadia, and the link between nature and magic Elena E. Giorgi: I met fantasy author Duncan Harper, author of Witch of the Fall, over ten years ago, when I was still living in Valencia, Spain. Duncan was one of the writers in my first writers group, all English-speaking expats living in Spain. On our first meeting, Duncan brought a scene he'd been working on, where his main character was fencing ag