Posthumous debuts are rare, not least in the world of crime thrillers, where publishers want a brand for life, not an explosive one-off Swedish journalist Stieg Larsson presented his publisher with three completed books before he died in 2005 Since then they have found success across much of Europe, which now looks to Scandinavia for its brutal murders, as it once did for its pop music The Millennium trilogy, of which The Girl With the Dragon Tattoo is the opening instalment, features a class