Please Help! Avid 9 year old reader

Readers Digest Condensed Books. Some are on Internet Archive.

City Spies series by James Ponti
Sherlock Society by James Ponti
The Shadow Prince series

FYI the formatting isn’t appearing for me, so I’m not seeing what’s crossed out

I would recommend the following:

– Other books in the Percy Jackson universe. I’ve only read the main series, but I know he has a bunch of others that follow different characters
– Eragon series. It may be a bit advanced in terms of vocabulary, but I remember I read the first two books when I was nine and ten respectively and I was able to follow along just fine. I thought it was so cool that they were written by someone who was only a few years older than me
– The Adventures of Sherlock Holmes. It’s never too early to get into the classics, and Sherlock Holmes (especially the short stories) is very accessible to younger readers. They also make kids versions with easier language, depending on your son’s reading level
– Bunnicula. It’s about a pet rabbit that’s also a vampire that drains all the vegetables of their juices overnight. There’s a bunch of books in this series too. My fourth grade teacher used to read these aloud to us during reading time. All the students loved them and it was the highlight of our week
– The writer Avi (he only goes by the one name) has a bunch of books that were very popular when I was around that age. These were mostly individual books as opposed to series, but they were all very good. My favorite one was called Nothing but the Truth
– Frindle by Andrew Clements. Again, another great book by a great writer. He has a bunch of books, and I would recommend all of them, but this one was my favorite
– Inkheart series by Cornelia Funke
– The Thief Lord by Cornelia Funke
– Alex Rider series by Anthony Horowitz —> about a 14 yr old spy. The series has ~15 books and each one follows a different mission. I would say these are maybe geared toward a little older of an audience, but if your kid is reading Harry Potter, then you shouldn’t have an issue. There’s nothing in them that’s worse than Harry Potter book 5, so use that as your measure. Great books though, and I’ve never met anyone who’s read this series who didn’t like it
– The Falcon’s Malteser series by Anthony Horowitz. This series has four books, all of them following along as two brothers run a detective agency. These books are among the funniest I have ever read, and the only downside I see to them is that your son might go through them too quickly. That being said, they are endlessly readable and my copies of the books are falling apart from how many times my siblings and I read them growing up
– Artemis Fowl series by Eoin Colfer. This series has maybe like 9 or 10 books in them, but I can only in good conscience recommend the first 5. They are about a genius kid of rich parents, who’s left alone a lot, and to entertain himself, he discovers a secret fairy world that’s underneath the human world. He decides he wants to capture a fairy to learn about their magical powers, and when he succeeds, the fairies will do anything to get her back. They are fantastic, thought-provoking, exciting books, and after the 5th one, you can tell the author ran out of ideas. The story feels complete after the 5th book, and I’m honestly much happier pretending that’s the end of the series and there are no more books.