Third-Person Observer Perspective

I saw this as an advertisement on SNS.
I thought I should read it because it said it won the 14th World Literature Award Excellence Prize in 2018.

It was interesting to unfold the story from the observer perspective of various characters regarding people and events.
The protagonist's perspective never appeared. The protagonist eventually remained an observed existence.

The story of a serial killer's son felt like Seven Years of Night.

However, the subject matter was somewhat predictable, and the way the story unfolded was a bit disappointing.
It felt similar to when I read Jung Myung-seob's Memory Bookstore.
A feeling of rapidly developing the story because they want to finish it quickly?

However, I like that it doesn't reveal the protagonist's inner thoughts and leaves it to the reader to judge.
I think it was expressing the ambiguity of the boundary between good and evil, and that there is no single truth.
Still, I always like open endings.