Mikael Blomkvist is trying to reach Lisbeth Salander, the unstoppable girl with the dragon tattoo. He needs her help unraveling the identity of a man who died with Blomkvist's phone number in his pocket—a man who does not exist in any official records, and who possessed dangerous knowledge. But in David Lagercrantz's third follow-up to Stieg Larsson's trilogy, Lisbeth has disappeared, and no one knows that at long last she's got her primal enemy, her twin sister, Camilla, squarely in her sights. In the end, it will be Blomkvist who could make it possible for Lisbeth to face the most important battle of her life, and put her past to rest. But will he have the courage?