If you are reading the book and you find yourself reading because its there and you can find your self inside the narrative, the book is not for you.
The only way I feel a book worth reading it is when I get caught on its descriptions and the characters. When you are mostly reading and finding your self discovering something unique, landscapes, people, background, anything that makes the book come alive.
This is my personal experience, yours could be very different, because that's the funny thing about being a human being, we all perceive the world differently.