Investigator Arkady Renko, the pariah of the Moscow prosecutor's office, has been assigned the thankless job of investigating a new phenomenon late-night subway riders report seeing the ghost of Joseph Stalin on the platform of the Chistye Prudy Metro station. The illusion seems part political hocus-pocus and also part wishful thinking, for among many Russians Stalin is again popular; the bloody dictator can boast a two-to-one approval rating. Decidedly better than that of Renko, whose ...