I refuse to believe I am the first to say this book's cover is deceiving. 
 Without harking back to the well-known saying, I saw the cover with its bright green grass which, if it were music, would be in the major scales, and immediately thought of a The Fault In Our Stars-esque love story. 
 This book is not like that. This book is dark. This book is grim. 
 This book is better. 
 I know I just did that thing a lot of book reviewers do which you only notice if you hate a book they love. They profess their adoration for it through a number of vague and flowery phrases (and lists of three *CinemaSins ding*). This book wasn't perfect, though. There are interjections in italics from the narrator (this would probably make more sense if you've read the book). I found them preachy, patronising and unnecessary. The main character and her friends are hardly decipherable from each other personality-wise (view spoiler)[ at least at the beginning, but I'll get to that (hide spoiler)]. 
 However, this book is good. It's well written. It's gripping. It's emotional and it's tense (but not enough to move my stone heart). I'd definitely recommend this book. I even ended up liking a character (view spoiler)[ Kent sets my long-repressed inner fangirl alight (hide spoiler)]. There's even a male love interest who isn't a stalkery, assholish, manipulative prick in a YA book? Wow. Actual miracles. 
 For real, though. I haven't read a good book that I've actually enjoyed in a long time, so that probably affects my review quite a bit. I mean, I recently read Hush, Hush and Patch is a clear example of how not to write a male character in a YA book. 
 In short: good book, read it if you're interested in it. 
 Now for my little theory. You can stop reading now if you're just here for the review part. This is my odd, subjective opinion and inner English lit student manifesting itself, and I don't have another platform where I can share it. Prepare for the rambling: 
 I think this is a rather cheeky concept for a first novel. If you repeat only one day with roughly the same events over and over, that allows you to iron out most potential plot holes, and add a lot more detail to it. It also makes for a teeny tiny bit of repetition to fill pages, in this book's case. Moreover, the repeated situations make for clearer character development shown through different reactions and choices in the same situations. 
 Cheeky, no?