The Si-Fan Mysteries — Sax Rohmer

Mystery piles upon mystery across London, and at their heart lies an exclusive hotel. It soon becomes clear to Scotland Yard commissioner Nayland Smith that the dreaded master criminal Dr. Fu Manchu must be behind the baffling events. Only this time the Devil Doctor has not come along -- with him are the dreaded Si-Fan criminal tong who will stop at nothing to do accomplish their master's plans!