The synopsis is slightly misleading in my opinion. The pier scene lasts maybe 2 pages and isn't a massive part of the overall story. 
The book is more about mental health, revenge and grief. Which I wasn't expecting. 
Although I did enjoy this. I had no issue just sitting and reading. In fact I flew through this. The writing gripped me. 
However the story itself had potential but was missing something. 
This book had some dark themes including terror attacks, child sexual abuse, self harm and drug use. However most of these feels like they are mentioned them moves on like it isn't such a massive thing to happen. Especially Evan and Jessica's circle posts. How are you going to tell us those things at the VERY end and do nothing about it? 
Speaking of the end I didnt like how it just ended. I felt there was a lack of wrapping things up. I had too many questions at the end. 

This had so much potential if things were focused on a little more. So I'm interested to see how the authors writing grows in future books.