In my opinion, the first three books were the best. I think that the first book was very whimsical and imaginative, but it got a bit worse each book. The final three I didn't like too much. They were good, just could have been, well, less predictable. A lot of people make fun of people who read HP because they are assumed to be obsessed over it, but that isn't always true. And, if she made an eighth HP book, it wouldn't be very good and fairly predicable. Also, I am a firm believer that she shouldn't have brought Harry back to life.
Perhaps it would be about the next generation of Potters, Weasleys, and Malfoys? That might be somewhat interesting.
31 things you might not know about the Harry Potter books and films
You may know that J.K. Rowling came up with the idea of Harry Potter traveling on a train, but did you know that Quidditch was her favorite made-up word? Or that her favorite Harry Potter books are the first and the last? Since July 31st is J.K. Rowling's birthday and is also, naturally, Harry Potter's, here are 31 things you might not know about the Harry Potter books and films. Ref. Source 4z
I think the Harry Potter books are a fine piece of modern literature that crosses age categories and cultural boundaries, no easy feat even in this day and age. I have read each book and I have seen the entire movie series, and I look forward to anything new Ms. Rowling may put out.
The series has some of the most intricately-crafted characters in modern times. Harry, Ron, Hermione, and several of the other characters are real, living and breathing characters with relatable issues, desires, and challenges, even if they are wizards living in a magical world. The only exception is the almost total lack of a sexual element throughout, an intentional omission by the author which leaves the books accessible to younger readers. Each of the books works in the framework of the entire series, building and pruning as the tension builds.
I suppose the greatest testament to the Potter books, though, is the fingerprint they have left in young adult literature. Perhaps books like the Percy Jackson series might have come out anyhow, but after Harry Potter's blitz, the market was blown wide open for others to follow. From the Twilight series to Divergent, these books are a marketing force, and the entirety of media looks on in wonder.