The Magicians by Lev Grossman. It's an extremely well-written adult mashup of Harry Potter & the Chronicles of Narnia.

Another vote for Garth Nix and the Old Kingdom series, starting with Sabriel. Excellent world-building, a unique magic system and characters with interesting growth over the series.

Check out Spinning Silver by Novak and Night Circus by Morganstern. Similar vibes

The secrets of the immortal Nicholas flammel series by Michael Scott was lovely!

I find my own annotations distracting when I’m rereading a book! I only annotate cheap paperbacks for uni and I’ve one or two novels I’ll eventually replace with unflagged/scribbled on copies because I just want to reread the stories.

Even professional annotations are sometimes annoying. Sometimes they’re really helpful but Ive come across a handful which spoil later parts of the book. Why?!

The Percy Jackson series (all of them) build a really cool world around modern day and mythology

They aren't all about the same main character but all in the Abhorsen family. They're quite good if you're interested in the Old Kingdom and not just Sabriel.

Naomi Novik's Scholomance trilogy has been great. You might like the Chrestomanci novels by Dianna Wynn Jones, Garth Nix Abhorsen series is great.

It would really be useful to know what you liked about Harry Potter.

Dresden files feels similar but slightly more mature

The Realm of the Elderlings by Robin Hobb

Babel by R.F. Kuang may be interesting if you like languages. It also covers some very interesting bits of history

A lot of people seem to recommend Percy Jackson. Maybe I should give it a try

Keeps up with the fantasy theme after all

Another Fine Myth. Not as serious as HP, more light hearted and from a 1st person narrative but it’s def fantasy/fiction and just a fun read.

Percy Jackson is after Harry Potter one of the best YA bookseries. It is kind of funny and brutal.

Amazing series. Makes me nostalgic :) read these as a kid

The Holy Bible by God

I like Abhorson. I only just discovered recently that Garth Nyx wrote more books for the series years later. I haven't made it as far as reading them yet though.

Enders Game is good.

7th son series

The Green Rider series by Kristen Britain. Great youth fantasy series

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Agreed. And in the case I'm referencing, McMurtry reveals a spoiler about the book itself and an even bigger spoiler about the sequel.

I don't understand why authors would assume that people have read the book before. Think reading it once the book is finished is the way forward now.

Keeper of the lost cities series by Shannon Messenger is the closest I've ever come to reading something that gave me Harry Potter vibes and I say this as someone who's been reading fiction for over 10 years.

While some of the dialogue and actions of the characters can make you cringe at times( pre-teen to teenage characters so it makes sense), it has a lot of magic and world-building that I loved about the Harry Potter series. Give it a try and check it out!