This book definitely gets 5 stars. I loved every word of this book. The author has outdone herself. The concept of the plot is really creative and although it is fairly straightforward it has the desired effect of keeping you on your toes and not wanting to stop until you have read every word on every page. Even just the blurb has me gripped. Hannah is scared which is a fear that everyone can relate to. The author has used emotions cleverly to make you feel more connected to the book. Because even though in reality very few people (I hope) have been locked in a small cage, fear is still something that everyone has felt in at least one point in their life. This makes the story more compelling to the reader as they can relate to the main character. This is a book that you will be curled up in your bed with at 1am not wanting to put it down. You will go through a whole roller-coaster of emotions but it is most definitely worth it.