Ok 
The first half of the book was total weird 
It felt like we are reading a drama (little bit romcom too) 
After second half few things were happening 
In each chapter 
Yet it was slow but fast then first half
The end was little satisfactory 
Yeah only little 
Like it has half satisfaction
As for shock thing nothing was shocking enough...it was predictable enough 
Even the killer was predictable and their reason 
.
Trill element was too less
It was like nothing 
Actually I don't know what should have been the genre too.
Also seems like Name has no relationship with the story ...only that there is marriage so guest list.
.
I also understood why this won the Goodreads choice awards for thriller 
It is for that small satisfaction I felt in the end.. for that people voted it..
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For a regular thriller I don't think this would be great book but it was ok 
For someone new to thriller it's fine like they can give 3-4 stars.
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First half is too slow 
And no thrill 
Rather than scary it was creepy the things people did.
Those things felt stupid 
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Trigger warning : Bullying, Toxic relationships (undue advantage, blackmail)