This book was really good. The action in it was incredible. The plot twists were never ending. The final chapter were astonishing. It deserved all 4 stars that it got, and maybe even deserved more. But, I couldn't give it 5 stars because of the gruesome factor. It was quite disgusting sometimes, going into graphic detail. I would rate this book PG-13. There are many scenes in it that are disgusting to the point of disturbing. There is a lot of violence and intense descriptions. If you can get past this (it doesn't come up too often), then the book is altogether fabulous. But, readers should be warned, and this is NOT a book for younger children.