Robert Somerlott – The Inquisitor’s House (Sphere, 1970)
Blurb:
At the stroke of midnight on the day of the dead a mysterious explosion shakes a haunted mansion in a Mexican city, bringing instant death to five people who have gathered there for a seance. The links between these five, and their reasons for seeking communion with the dead, provide material for a substantial novel of the occult, adventure and suspense. The narrative is fast-moving, the nineteenth century bakground bloody, and the guilt of the doom-laden characters colorful.