4.5/5 Stars [This review contains only mild spoilers] 
 This book was slightly different from what I was expecting, but not in a bad way. I was expecting a vigilante justice story about a girl who gives bad people what they deserve, and part of it was that, but it was also so much more. It was a look at the way society views rape culture and the impact it has on those affected by it, but also a story of guilt, anger, and growth. The characters were all dynamic and unforgettable, and the writing was honest and unflinching. 
 Alex is dealing with the aftermath of the rape and murder of her sister. She's always felt a sense of 'vengeance' inside of her, a darkness that has haunted her ever since she was little. When she gets away with killing her sister's murderer, she has to wrestle with whether or not she can succumb to violence like that again, this time, in various situations where her newfound friends are in danger of sexual assault. Although Alex herself says that there is something wrong with her, and she does feel guilt for her actions (though she does not regret them), it is easy to find yourself rooting for her whenever she unleashes her 'vengeance' on a would-be sexual predator. 
 I really, really loved Peekay and Alex and their relationship, and the way their character development mirrored each other's. Peekay was definitely my favorite character, but I loved Alex too. Alex had been hiding away ever since the murder of her sister, feeling detached and lost. Her friendship with Peekay opened her up to her feelings again, and helped her come out of her shell and make connections with people. She helped Peekay become more confident in herself, and deal with her feelings in a healthy way (which was ironic to me because Alex didn't do this herself). The moment between them in the car towards the end of the book was so sweet, and really made me appreciate how much the two of them had grown as characters since the beginning of the book. 
 One part of this book that really interested me was how it was mostly about Alex, but her chapters were always extremely short and usually reflections on events that had already happened rather than describing the events themselves. Most of Alex's characterization was seen through the eyes of Peekay and Jack. I didn't particularly like Jack, he pissed me off a lot, but I understood his purpose in the story and in Alex's character development. Seeing her in three different ways really made me appreciate what a dynamic character she was. And all three perspectives showed a different side of her, until the end when they all somewhat converged. The last chapter of the book was incredibly poignant and will always stick out as one of the best endings to a book. It showed that not only did Alex benefit from the friendship of the other girls at the school, but that they benefited from her friendship as well, and her legacy would live on beyond her. 
 As I said above, Peekay was my favorite character. I loved her story, which was one about coming to terms with her own internalized misogyny, and feeling comfortable with herself. She starts out heartbroken and hung up on a guy who left her (Adam) for a girl she hates (Branley), and she directs her anger towards Branley rather than Adam. However, by the end, she is barely even thinking about Adam and forms a bond with Branley. Her character development and friendship with the other characters was heartwarming, and I loved reading from her perspective. 
 At its core, this book is a story about rape culture, about the insidious way it impacts our lives whether we realize it or not, and how much of it is overlooked. The characters deal with sexism, internally and externally, slut shaming, the idea of "boys will be boys," and so much more. It's a gritty and unforgettable look at sex, violence, and adolescence that will stick with me for a long time.