I don't want to spoil the book for anyone, so I can't really explain more than that. It was an interesting book and it raised a lot of questions in my mind. Mostly about whether souls exist or the mind just creates a personality? Also, is who we are a part of every cell in our body? What does this mean for organ transplants? The concept of the book is a worrying pit of questions without answers, but it's a future we're rapidly moving towards.
