I'd give this 3.5 stars if I could.

Three books in, I can see that things are looking up for this series, but I'm still not totally sold on Harry, the main character. He's too...predictably fragile. In all three of the books so far, a woman he cares about is killed and he goes on a bender and is obnoxious. This book has the shortest version of that, thus the extra half star, and Nesbo is doing more interesting things here with research and history and narrative structure. Which don't all work that well, but I'll give him credit for the experimentation.

I'm going to try one more...