The brand new adventure from the author of A Betrayal in Blood, in which Sherlock Holmes and Dr Watson are faced with a fiendish locked room mystery. A FAMILY SECRETIt is 1894, and after a macabre seance at a country estate, a young woman has been found dead in a locked room.When Dr Watson is invited to a weekend party where a seance is planned, he is prepared to be sceptical.James Crain, heir to the estate of Crain Manor, has fallen in with a mysterious group of Spiritualists and is determined to prove the existence of the paranormal.Confronted with a suspicious medium and sightings of the family ghost, Watson remains unconvinced - until James's sister, Lady Esther, is found dead in a room locked from the inside.Holmes is called to investigate the strange events at Crain Manor, but finds that every guest harbours a secret.Holmes and Watson must uncover the truth, and test the existence of the supernatural...