They thought they were doing a renovation, not an exorcism. The house had other ideas We walked into the house for the first time on an impeccable autumn afternoon, the kind where the light takes on the hue of burnished gold. It was October of 2009, and we were looking at homes in a small, appealing town in Pennsylvania’s Lehigh Valley. The place had been staged for our visit, of course, but the red and burnt-yellow leaves falling from an old maple tree in the backyard twirled and waltzed with an unpremeditated perfection. There was a huge hearth and a...