This book is not good. As a murder mystery it's really obvious early on

(if you've ever had an obvious crush on someone who knew that about you and used it to their advantage, you will absolutely catch on in the first 10% of the book)

, and I found myself surprised not to be successfully pointed toward any other characters as the possible killer.

As a story about a secret society with dangerous initiation rituals, the rituals (hyped up the entire book as being horrifically worse for the girls) were pretty tame? The kind of thing you hear about fraternities getting a slap on the wrist for. I hated that throughout the book the horrors we were made to expect were some sort of ritualized sexual violence. I felt the author was using that as a way of keeping me on the hook for the end to find out what had happened to the MC. In the end, "what were the 'pops' they had to endure" was the real mystery of the book.

On top of all that, it's written like bad fan fiction, over-describing every sensation. Real quotes from the book: "The day after Thanksgiving. I remember because I had apple pie for breakfast and I could still taste the thick, sweet filling on my lips when Adam texted." "I knew she was waiting out front thanks to the deafening notes of Whitney Houston’s 'How Will I Know.'"
There's a lot about how loud everything is. I mean: “He rips [the condom wrapper] open and the sound pierces my ears.”

There's also the time when in one sentence her boyfriend ignores the MC in the hallway and in the next paragraph she says he's always giving her puppy dog eyes in the halls.

Alllll that said, I mainly picked this up because of the show starring Halsey that they're adapting it for. I can see this being a fun guilty-pleasure style TV show along the lines of Riverdale or Pretty Little Liars, and I'll probably give it a watch when it comes out.