I really enjoy the Millennium Series and The Girl Who Lived Twice, in my opinion, lives up to the Stieg Larsson story that he started. The Millenium Series follows Lisbeth Salander and Mikael Bloomquist, two people from different ends of all spectrums but always manage to find pain and trouble.
Lisbeth is set out to get revenge on the Russian Mafia and kill her sister, Camilla. Bloomquist is set out to do nothing. He's in a rut and just wants to holiday at his lake home. At the same time, a homeless man dies, and nobody pays any attention to him, except for one person. Langercrantz weaves these stories into a tale of political corruption and the criminal underworld and does it at the pace of the Larsson books, a little slow but always entertaining. A very good book.
The Girl Who Lived Twice by David Lagercrantz,
The Millennium Series Book 6