I was sort of disappointed when I read this book; I was expecting something a little darker, with more of the horror element to it. I wasn't afraid for the characters like I have been in some other books.
I also did not like Violet enough to care about her situation and found that she made choices which were not always fully explained and thus left me confused. I did not connect to her and I actually found myself feeling empathetic towards the "villain" of the story, instead.
However, this book was not entirely disappointing. While I love angels, vampires, werewolves, etc.., I appreciated that the author chose to deviate from the stereotypical YA novel's cut-out paranormal type characters and try something a little more original.
I recommend this book to those who are looking to expand away from the angels/vampires/werewolves in many of the other current YA books.
this review can also be found at http://fortheloveofbooksreviews.blogspot.ca/2015/03/between-devil-and-deep-blue-sea-by.html