I've finished this book in 2 days . I really liked how the book throwed the reader in circles about who the killer might've been, even opening the reader's view into thinking it might've been someone else who was not in the group our even the victims themselves. I also enjoyed the dark secrets of the main crew , it had been exciting seeing Mackenzie's viewing point changing from ' none of my friends could've done this' to 'I cant trust any of them (except Blake ofc)'. What I didn't really understand is why there was a bit of plot holes here and there , things that had been said and never brought up again . To me it was pretty obvious who the killer was seeing how Makenzie had described them and the actions of the killer before and after the murders took place . It had also a bit odd how They were looked at by Mackenzie once and never fully noticed intill the end . I would say it had been clear in my mind who It was when they had brought up something the character had had before and after the murders.
Other than all that the story was a great read and kept my attention in the best ways.
(My apologies if my commentary was to vague , I tried to keep most of the spoilers out of this post).