Before I start this review I'd like to ask you to go to my Goodreads review of this book to see the state of mind I was in when I finished this book. That is to say I was losing my mind. I went into a full pledged panic-attack-freak-out. I don't even know how capable I am of writing a proper review for this book, but I'll try. Wish me luck.

As I'm still kind of... off... about this book, I'm going to divide this review to sections to better focus myself :]

Is gorgeous!!! LOL, had to get that out of the way. I simply adore the cover. It's the main reason I decided to start reading the book now (shallow as that may be). Aside for the cover being beautifully done, there is the kiss itself. There is something so sweet and cute and loving about this kiss, which fits Callie and Kayden perfectly in my mind ♥

"Life is full of luck, like getting dealt a good hand, or simply by being in the right place at the right time. Some people get luck handed to them, a second chance, a save. It can happen heroically, or by a simple coincidence, but there are those who don’t get luck on a shiny platter, who end up in the wrong place at the wrong time, who don’t get saved." 

--First paragraph of The Coincidence of Callie and Kayden

The plot is not easy to stomach. It deals with the uglier parts in life, with abuse and the worst kind of human nature. It's the kind of plot that makes you sick. The kind of plot where the heroine and hero did not win, were not saved, but lost and got lost in the clatter. In life. It's the kind of plot where they try to mend the breaks, to put the pieces back together. Where two broken people make one whole together. 
It's the kind of plot that gives you hope people can overcome such horrible things... at least, until the end of the book. 
It's the kind of plot I, for one, can't afford myself to be 100 percent connected to--I have to keep myself detached--or threaten my mental health. It's easier to read this book, to remember it is a book and no one actually hurt them like that, when you're detached. 
Half way through, though, I couldn't maintain the... wanted... distance from those characters, hence the small meltdown when I read the ending. 

I wasn't even 10% into the book when I decided I really, really wanted to give both Callie and Kayden a hug. There is just something so...