At the outset of the novel, Sherlock Holmes receives a mysterious cipher message from an agent of Professor Moriarty.
Sherlock Holmes is famous for his intellectual prowess and is renowned for his skilful use of.
When they arrive at Brimstone, John Douglas is already dead, leaving Sherlock to use his detective skills to solve his biggest mystery yet.
Together Holmes and Watson decipher Moriarty\'s message which relates that a man named John Douglas, residing at Birlstone, is in danger.
At the outset of the novel, Sherlock Holmes receives a mysterious cipher message from an agent of Professor Moriarty