Just as I said, Galaxy Zack series (he must have been 7 at the time though), Time Jumpers (fairly recently, there's only 4 of them and I don't know if the author will write more), Desmond Cole (about ghosts). But that's pretty much all for the last 1+ years... I'm trying some of the "Scooby-Doo" books, not comics but regular chapter books, and he seems to read them at least. I'm going to try more "grown up" books (just picked up Class Dismissed, it's a winner of some prize or whatever), we'll see how it goes.

But it's honestly really frustrating. I'm older (grew up in the 80s) and we read MUCH more, and I think it's important.

Do you know of any resources/discussions I can look up/participate in?

Mensa surprisingly has some good age-appropriate book lists linked at the bottom of this page: https://www.mensaforkids.org/achieve/excellence-in-reading/

(At that age, I was a huge Animorphs fan, but some parents might not be comfortable with the violence and gore.)

I had no idea Mensa did this, I will give this a try. I'm not sure he's up to all of these, but we'll try and see.

When I was that age I read basically nothing but Hardy Boys books. Also Alex Rider books and Harry Potter, all out of order.