The Girl Who Played with Fire by Stieg Larsson

The Girl Who Played with Fire - Lisbeth Salander has returned to Sweden after an extensive world tour.  She learns that Mikael Blomkvist and his magazine Millennium are planning to expose a sex trafficking ring operating between Eastern Europe and Sweden.  The journalists are murdered as well as Lisbeth’s guardian.  Lisbeth is the authorities’ suspect.  Only Blomkvist really believes in her innocence.