I didn't like the original trilogy by Stief Larsson, and I didn't really like this either. It was different without being any better, though I did enjoy it more than the third book. It felt very disjointed and I struggled to follow along with the many characters and different plots. I found myself frequently forgetting who was who and what they'd done. It did feel like they hadn't built up to this at all from the previous books, which makes sense with a new author. I wouldn't call it a disappointment because I wasn't expecting much, but even if you've enjoyed the trilogy, I wouldn't really recommend this book.