I have mixed feelings about this book. I liked the storyline, and the pacing was good. The story moved along nicely and kept me interested. It was interesting to learn about post-concussion syndrome, and I thought that Larkin's dealing with it (the eating disorder, struggling with how her friends didn't stay in touch, the anxiety and chronic headaches, trying to figure out who she is afterwards) was compelling and realistic.
I did feel like some of the characters were pretty one-dimensional (especially Luke and Raegan's mom, who were basically stock characters). Raegan herself could have used a lot of work as a character, too.
A big complaint of mine was that the eating disorder, as portrayed in the book, was very much simplified. It was stated over and over and over again in the book that her eating disorder stemmed from a lack of control over her life. While that is part of the cause of an eating disorder, the truth is that eating disorders are so much more complex than that! Honestly, just saying "it's a control thing" is the 1990's simplification. I wish that the author had researched and understood eating disorders more, so that the topic could have been explored in more depth.
Furthermore, the book made it sound like anorexia is the only eating disorder. Larkin had anorexia. The other people in the hospital treatment program were described as skeletal anorexics. At the end, when she spoke to an eating disorder support group, the girls were described as tiny and bony (anorexics). The fact is, most people with eating disorders are average weight or overweight. According to The Butterfly Foundation in Australia, underweight anorexics make up only 3% of the eating disorder population. Binge Eating Disorder is the most common eating disorder, followed by OSFED (Otherwise Specified Feeding and Eating Disorder). I am sick of all literature on eating disorders focusing on an underweight, white, teenage anorexic. That is the only image that books and the media portray, and it is inaccurate and harmful to actual eating disorder sufferers, who are a wide spectrum of ages, races, genders, sizes, and weights.
It is also questionable that the author gave specific statistics on Larkin (5' 8", 89 pounds). Eating disorders can be competitive, with sufferers always feeling "not sick enough" or not deserving of treatment. I don't think the author understood this, both because it wasn't portrayed at all in the book, but also because if she understood that, she wouldn't have given Larkin's specific stats (a BMI of 13.5 - she might be dead!), as it can make the reader feel invalid and "not sick enough" if they aren't on death's doorstep with a BMI in the 13's. This isn't necessarily the author's fault, I guess, but if you are writing a book specifically about eating disorders, then avoiding numbers like this is generally a good policy.
Also, the part about the character Erin was so random! Larkin ends up in the hospital, and lo and behold, she is reunited with a childhood best friend (who I don't think was ever mentioned during the previous 150 pages of the book???) who is also anorexic. We get a chapter of their reunion, and then Erin dies -- as a plot point and a life lesson. I think that part could have been meaningful if Larkin's relationship with Erin had been described and emphasized as important earlier in the book, and then if the two had been in treatment together for longer. Instead, it just seemed really random and odd for this new (but apparently oh-so-important to Larkin character) to suddenly pop up, and then die and be gone just as quickly.
Raegan's quick turnaround from being a terrible human being to suddenly being a kind, loving, apologetic person and one of Larkin's best friends was unbelievable. I don't think Larkin would have -- or should have -- forgiven her, and I also don't think people change on a dime like that.
I guess one other positive was that the copyediting was good. So many self-published books have spelling, spacing, and punctuation errors. This book was well-edited, both plot-wise (for the most part) and grammatically, which was nice to read.