She is introverted because she had a traumatic childhood. She has a complicated relationship with Mikael Blomkvist, but at the end of the novel she saves his life.
This book is one of my favorites and I enjoyed the story because there were lots of twists and turns, it maintained my focus and I couldn’t put it down unless I read it. It was interesting and unpredictable. I also liked that Larsson made references to Swedish society. So in my opinion you won’t be disappointed if you read this book and I recommend it to everyone who likes crime and mystery, also detective motives.
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