The Darker Arts Av Oscar De Muriel

<P>Madame Katerina, Detective ''Nine Nails'' McGray''s most trusted clairvoyant, hosts a séance for three of Edinburgh''s wealthiest families.<br><br>The following morning everyone is found dead, with Madame Katerina being the only survivor. When questioned she alleges a tormented spirit killed the families for revenge.<br><br>McGray, even though he believes her, must find a rational explanation that holds up in court, else Katerina will be sentenced to death.<br><br>Inspector Ian Frey is summoned to help, which turns out to be difficult as he is still dealing with the loss of his uncle, and has developed a form of post-traumatic stress (not yet identified in the 19th century).<br><br>This seems an impossible puzzle. Either something truly supernatural has occurred - or a fiendishly clever plot is covering a killer''s tracks...</P>