Harry potter ban

Paige and I are reading Harry Potter together.  I started reading it to her, but as her reading level is so high she is able to read it by herself for the most part.  I'm sure some words she doesn't understand, but then again I don't either with some of the british expressions.  At night Paige reads for a while in her bed with a flashlight and then goes to sleep.  Usually she reads her library books but one day she wanted to keep reading Harry Potter so I sent her into bed with it to continue a bit on her own.  Since I've obviously read the book it didn't really matter if I missed any of it.  Eventually Paige comes out of her room (close to 10:00) saying that she couldn't stop reading because the chapter was long and there was never a sentence that ended at the end of a page. AND she was scared of the 3 headed dog. So now Harry Potter has been banned for alone reading. We are reaching the end and I've told her we can re-read the first book for a couple of years but that Harry Potter is for older kids...especially all of the other books in the series.