Weak implementation of the Book

Apparently not only am I of this opinion, as compelled the screenplay's author took almost a justification for its implementation in relation to the book on the PRO7 page to write.
The film itself alone was good and exciting shot in a high standard. Nevertheless, my opinion falls like this:
Anyone who has read the book the film should look in no case. Anyone who has seen the film and approved will be delighted by the book.