so I asked my DD13(she will be 14 in sept) if she felt the books were inappropriate for a 10 year old and here is what she said: " the first 2 books are fine, the 3rd book is not a good choice for most 10 year olds, the last book is very inappropriate for a 10 year old". I also asked her about the Twilight movies and she said that there is no problem with the first two but, Eclipse (the one that just came out) is not for 10 year olds and when the next one comes out(she is guessing based on the overall pattern of the books and the other movies) that it would be a definate NO for a 10 year old.
She told me the reason she feels the books/movies are inappropriate for younger kids is because of the "sexual content" and language.
* I asked my DD because I figured it would give you a better idea of what a child thought of the books/ movies, I hope it helps.
**oh, and I told my DD that our neighbor took her 9 year old DD to see the newest movie (Eclipse) yesterday and my DD's response was "mom, are you kidding me, wow, that is just a way inappropriate movie for T____ to see".