A couple years ago I suggested a new method for evaluating books. I called it a cardio scale because it would use one to five hearts to refer to how fast the book made doing cardio at the gym seem to pass. A five heart book would be one that takes one out of the moment and transports him into the story so that a half hour goes by and she never even notices.
Actually, that might be a four heart book. Maybe a five hearter would be one that so engages a person that adrenalin is released and he trains even harder without realizing it, until at the end she looks at the number calories burned and sees it is more than she ever burned before or perhaps even thought possible. You know, not so much a "page turner" as a "leg burner."
Unfortunately, I quit doing cardio (dumb, I know) and so never really did work the system out. But now I have a new way of rating a book, and I think I like it even better. If you've read a book so many times that it literally falls apart--now that is a good book! When it comes right down to it, could you give a book a higher endorsement than that?!