“The Girl with the Dragon Tattoo is an unlikely best-seller — it’s the first book in a trilogy of thrillers written by Stieg Larsson, a previously unknown Swedish journalist who died of a heart attack in 2004. Knopf Editor-in-Chief ‘Sonny’ Mehta, who snapped up the rights to the thrillers, says he was attracted to the ‘absolute ambition’ of the trilogy. … Still, the fact that the trilogy’s author is dead complicated things.”