Since traditionally one settles down with a ghost story or two on Christmas Eve, I decided to embark on reading about a real-life ghost hunt that began with the Fox sisters launching 'modern spiritualism' in Up-State New York in the 1840s and whose first phase was concluded in the first decade of the twentieth century with the death of the principal psychial investigators. In the interim, they had founded the Society for Psychical Research (and its American equivalent). Blum, herself, admits, in an afterword, both to having not a 'psychic' bone in her body, never having had any kind of anomalous experience, and, in writing the book, moved from a skeptical position to a more open-minded one. There may just be more in heaven and earth than is dreamt of in our (materialist) philosophies. It is a well-arranged, artfully paced, and broadly judicious telling of the remarkable men (and one woman) who formed the backbone of the psychic investigators, their principal subjects...