We've got a very violent novel on our hands here. Much of the violence in The Girl with the Dragon Tattoo is sexual, but other forms of physical violence plus verbal and psychological violence are explored too. This is tricky because Lisbeth Salander, the novel's star, is pretty violent herself. She has violent thoughts even toward good guys, like Blomkvist. She uses violence to get revenge, and to exact what she sees as justice on her enemies and other predators. And she has no qualms about her aggressive methods. By contrast, Blomkvist is never physically violent that we've seen. But he uses his pen like Salander uses her taser, to get revenge and to fight for causes he thinks are just.