As it stands in today's publishing market, books are not really rated in any specific way. There are some publishers who put age ranges on the back cover of Young Adult novels (like 10-12 yrs. old or 12-15). But for the most part, I know that publishers try to avoid that because they don't want to turn off certain readers.
So the way you'd find books sorted right now seems to be: Erotica, Adult, Young Adult and Children's.
So this Thursday's Question of the Day: Do you think that there should be a better rating system for books? Should they be like movies? If not, what you do you think would work to sort out the multitude of books that fly off the shelves each day?
LET ME KNOW YOUR THOUGHTS??