Now I understand why this book has been ranked first on このミステリーがすごい!, ミステリが読みたい! and 週刊文春ミステリーベスト10,
The book was really great, and it’s right up my alley as police procedurals are my favourite sub-genre. I also liked that the story is not focused on the main police detective but on the case. The plot is really good, the case is very complex, elements that seemed unrelated at first turn out to be more important that they looked, the end is excellent, but most of all, it’s heavily focused on characters, their motives and how they’re dealing with the situations they’ve fallen into.
Review
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91%
Ended up reading another chapter, the plot is incredibly good! 
There are two chapters left, I’m keeping them for tomorrow.