I downloaded this on the recommendation of a friend and after reading all the good reviews, I have to say I felt totally let down by this book. It was just bizarre.
The story starts with Senna waking up in an isolated house in the middle of nowhere with a friend from her past. So far, so intriguing. That's where the story derails. It jumps backwards and forwards across time periods, trying to explain various events and thought processes, but it's confusing to read. There's one point where the book just becomes a completely different book for three chapters - the character is reading a book written by her ex.
With regard to Senna, I didn't get her at all. She comes across as whiny, unlikeable and antisocial. Having gone back to read some of the other reviews, I understand the general consensus is that she has Aspergers, or similar, but if that's the case then it's not really explored. I just thought she was an unpleasant person.
The only reason I finished this book was because I was so sure it was going to get better. I was wrong.