Very good book it was a slow buildup but once it got going it was very creepy especially about the twins and the old folklore about them I am grandmother to twins and I kept thinking of them the whole time I read this book I thought her husband could have been more supportive also when you are reading this book you are wondering if it is really happening or is it in her imagination it was very hard to think that something or someone could do that and then when are switch supposedly that part was really disturbing because they were talking and singing and didn't like to be held either and when she finally does the switch you are still wondering was it all in her head or was it real it definitely leaves you thinking