Had no idea who Sax Rohmer was until I got my e-reader. He's the bloke what invented Fu Manchu. He must have been a cop in his previous life because the detail he gives on the use of cocaine etc in upper class London in the 1920s is a shocker - AND the details of the Chinatown opium dens. It could fall into the category of a police procedural but is saved by having some depth to the characters. Mind you, it was only Lady This and Lord That that were patronising the dens. Makes you wonder where the less posh went for their hit in this era. Excellent for getting a sense of London's Chinatown in the decadent '20s. Read only one Sax Rohmer per year, else they would all blend into one dope anthology! Do not read with red wine just before bed - vivid dreams . . .