Unputdownnable. After a long search for a great suspense thriller I was skeptical of this book but after the first 2-3 chapters I was hooked till the end. Great writing style, keeping readers entertained till the very end.
Best part is no new characters are introduced and everyone shares the blame equally till they don't. I was left wanting more in the end specially from Sarah's perspective.
Also the ending could have been slightly more detailed and shocking..but nevertheless I loved this book and will recommend it too!