I'm giving this 3 stars just for the plot line. The writing is pedestrian, and the characters are boring. Supposedly the 2nd book in the series, and the precursor to the 1st book. But it would hardly matter. This is a very hard story to read with multiple gruesome deaths with not very likeable victims. However, the real perpetrator is lost in the verbiage. However, I have my suspicion he will turn up in the next one.
Not sure I will bother with the next one.
This author is hailed as the next Steig Larsen but I don't think Steig would be flattered by that.