The first two thirds of this book was written in 2002, when only four of the harry potter books was out. That was really clear sometimes, and it was something that bugged me a lot. Some of the arguments the author made was just wrong if you take all the books into consideration. Many things that are pointed out as problematic felt like they got better/got a solution in the last books. (the author did coment on this shortly in a chapter of the last third of the book, which is written after the last hp-book came out, but I don't think she makes any good arguments about it there either)
I'm not saying all of it was bad. There was some great points about the story, most which I hadn't thought about before. But that's the only thing that makes this book any interesting at all, you do start to think about some new perspectives.
Also, it may just be me, but sometimes I had a really hard time following the arguments. I know it's supposed to be a more scientifically written book, but sometimes the language just felt to advanced for this kind of book.
If you want some new perspecives on thing, maybe give this a try. But I'm sure there are books written later that makes better arguments about the whole serie.