Sax Rohmer 
Golden Scorpion 

Four brilliant men have died mysteriously, and the only clue is the carved tail of a golden scorpion, left beside their bodies. The man behind the horror calls himself "The Scorpion, " and he clearly is a man of superior cunning. When the finest detectives of France and England join forces to stop "The Scorpion" before he can add a fifth victim to his list, the twisting trail takes them through the haunts of London’s underworld to the seamy opium dens of Chinatown, and from there into the Lair of the Scorpion. "The Golden Scorpion" was written by Arthur Henry Sarsfield Ward, known better under his pseudonym, Sax Rohmer. Sax Rohmer was a prolific eng novelist. He is best remembered for his series of novels featuring the master criminal Dr. Fu Manchu. (Excerpt from Wikipedia)