Hellish Nell is published this Thursday, revisiting a strange place where intense twentieth-century emotions met belief in the supernatural. Ghosts drifted through the seance room, dividing opinion and changing lives.

Hellish Nell - the strange tale of Spiritualist medium Helen Duncan - is over twenty years old. Time for a new edition: condensed here and there, expanded elsewhere, and published by Penguin. Out on 5 October.