This is the first volume of the Millennium Trilogy by Stieg Larsson, and focuses on the 40 year-old mystery of young Harriet Vanger's disappearance from a family gathering on the island owned by the powerful Vanger Corporation. Henrik Vanger believes that a member of his family is responsible for the murder of his niece, and hires Mikael Blomkvist, a journalist recently convicted, to investigate. Then enters Lisbeth Salander on the scene, the socially inept but genius computer hacker. The author cleverly interweaves the investigation of Harriet's disappearance with Blomkvist's attempt to clear his own name.