“Nothing will be interesting after Harry Potter”

Thinking of other series with that HP-like mix of magic and realism...

Redwall series by Brian Jacques
Over Sea, Under Stone by Susan Cooper (the first of The Dark is Rising series)

What about time-travel magical realism stuff like Charlotte Sometimes, Tom’s Midnight Garden or Moondial?

And if she’s a confident reader she’s probably not too many years off enjoying Discworld.

Oooh, and Skulduggery Pleasant! My 9yo son really enjoyed those (viewpoint protagonist is a girl, too).

He also liked Wolf Brother by Michelle Paver.

Harry Potter was first published when I was a child and I loved it - I used to count down to the next book release and beg my mum to take me to waterstone's as soon as it opened to collect my pre-ordered copy! I still managed to read widely and thoroughly enjoy lots of different genres. I studied English Literature at uni and continue to love reading until this day. It's wonderful if she's found something she enjoys and I strongly recommend re-reading every book you enjoy as it's amazing what you miss the first time around! Continue to foster a pleasure in reading and let her explore other books as and when she chooses.

Well, if she starts from the beginning again one of two things will happen.

(a) she won't find them as interesting as she thought she would, and she'll want to read a book with a different plot

(b) she'll continue to find them interesting - presumably because she notices more on the next read-through, the use of language or the foreshadowing or whatever; which is a Good Thing in terms of reading and literature. She might decide to read them a third, fourth... nth time

Once she gets to (a) have some suggestions. Percy Jackson (or How to Train your Dragon or Chrestomanci or Earthsea or the Dark is Rising) if she feels like extra powers and magical creatures are the way to go; Mr Gum if she wants a good giggle.

The Exiles by Hilary McKay is about a family of sisters who all love reading. She's also written a series starting with Saffy's Angel which I loved but I think is probably better for slightly older children.

I was and still am a ‘Potter Head’ JK Rowling in an interview interestingly talked about how she knows she probably won’t ever create something as impactful as HP again, she’s not putting pressure on herself to ‘top’ it, it was a phenomenon of its time and is what it is. I think it’s the same with reading it - no book is ever going to feel like reading HP when I was a child/teenager. Even reading them second (third, fourth in your late twenties ) time round isn’t the same! That’s ok - other books don’t need to be the same to be enjoyable. I also loved Anne of Green Gables by the way! They’re completely different genres - and you can be a fan of many different genres.

What was the one other book that she did like? And what were the ones she didn’t?

My dd1 has read all the HP books many times but has never really been keen on any other fantasy type books. She read real life type books like Jacqueline Wilson and Jean Ure many times.

Most libraries have ebooks and audiobooks that you can borrow, she might find something she likes.

My DC has re-read the HP series c20 times (genuinely) (not a stealth boast) though also reads lots of other books (also not a stealth boast) so there's hope, OP. She enjoyed all the Rick Riordan series' (there's more than Percy Jackson's series), Unladylike Murders, Artemis Fowl, and lots of others though the HP series is the only one that seems to get re-read quite so much.

Try not to worry and just introduce new books when you can to see what your DC enjoys (which is what I try to do to prevent a new re-reading of the HP series) which is what I can see is what you want to do anyway.

Good luck, OP.

she’ll need to read books set in real life with not that much happening in terms of the plot

I'm not sure that really follows. Books don't have to be fantasy to have an action-packed plot, plus fantasy vs 'real life' is really more of a continuum than an either/or in fiction imo. For example there is plenty of fiction set in real life places/situations and with normal human characters, but with plots which are not credible from a real-life pov. Most children's fiction is fantast to a certain extent. 'Plain books' wouldn't appeal to me and I'm in my late 40s with a largely literary degree!

Let her re read as many times as she wants!

Diana Wynne Jones is a good bet the Chrestomanci series in particular is amazing (you can get the whole set fairly cheaply)

Or Susan Cooper’s Dark is rising series

The Percy Jackson books are great - fun and exciting. My dc are both prolific readers of a lot more than just Harry Potter, but they certainly wouldn't have been interested in reading Anne of Green Gables or anything similar.

Why would she have to read Anne of Green Gables though? I've got nothing against it at all, but its not exactly an example to live your life by is it - when you're 8, reading should be about excitement and finding joy through books. I let ds have free reign in Waterstones/ the library / our books and its taken us in some very interesting places at times (and at times I hated his choices) but he's still a very avid reader at 13. These days he has a kindle linked to my account so I can let him have books I own (you specifically allow a child books you buy, he doesn't get everything ) and so he has free rein over all sorts to read or not as he chooses

Percy Jackson a big hit after HP here. DC are eagerly awaiting the tv show on Disney plus

I remember feeling like that. Leave her be and she’ll move on.

She’s currently telling me that when she finishes them all she’s going to start again from the beginning
Let her! Re-reading them when you know what to look for is part of the fun: there are so many hints and clues to find that you’d never spot without knowing the plot.

The Maximum Ride series by James Patterson is incredible

Well I adored both Harry Potter and then not long after Anne of Green Gables, so that’s not outside the realm of possibility!
Maybe she’s just inclined more towards fantasy (and there’s nothing wrong with that, there are plenty of brilliant fantasy/ sci fi/ dystopian books out there-she might like something like Artemis Fowl). I think I enjoyed Harry Potter for the characters more than anything though.

Also although Dd is a very accomplished reader she started HP 6 but found it very heavy going, it's aimed at a much older audience so it might be worth stopping your Dd at book 5. The books were designed to mature with the reader and that includes the language and structure of the later books.

Cressida Cowell Magic series were a big hit Wizards of Once

My dd was hp obsessed and was lost for a while when she finished the books around age 9. Percy Jackson has been the next thing to grab her but it took a bit of time.....

There are so many outstanding children's books nowadays - follow up books could be A Pinch of Magic, or Nevermoor or Malamander or the Nowhere Emporium ... all incredibly well written books. I would not really expect many children to read the books I did as a child, as there were not that many to choose from back then.
If she has read the HP books, I'd say it opens opportunities for her rather than closes them. She has the reading bug!

Other books he enjoyed having read to him were
The Boy who ran away from the circus.
The battle for gullywith
And there was one about a pirate(?) and a lunchbox... I'll have to look for it.

This was a problem with Dd nothing measured up to HP, she completely missed out on the worst witch series as it was babyish in comparison which is a shame.
She then found Diary of a wimpy kid and loved those. She's reading Cogheart with school during home school g and I got the rest of the series on kindle for 99p and she seems to like them.

Phillip Pullmans Dark Materials might be a good follow up.
I bought ds1 the first book in a series by Angie Sage (I think). It was called Magyk. I really enjoyed it. He's not a reader so didnt finish it. There's 6 or 7 books in total. I really should read the rest!