This may sound a bit harsh, but my enjoyment of the story profited greatly from the fact that I didn‘t actually read this myself but instead listened to an audio version.

Yes, the spooky vibes and interesting base plot are there, but you are soooo far removed from all horror (about four layers) that it's not really genuinely scary. 

For maximum enjoyment, I recommend the version narrated by Jonathan Sims, because you can tell he genuinely likes the story and voices the different characters so distinctly and in such an entertaining way that highlights the good parts of the story and even makes the slower ones enjoyable.