Recommendations for nearly 9 year old

[Exactfare]

He's an avid reader - he's just finished UK the frostheart books and has previously loved the wild robot and kid normal

Looking for a new series to buy him for Christmas

Thanks!

The Land of Roar series. A Place Called Perfect series. The Wild Way Home.

Beetle Boy series

Roman Mysteries?

How about George's Secret Key to the Universe by Lucy Hawkings?

Wizards of once
Simon Thorn

I recommend Crazy Shoes by Brenda Mota and Lauren May: https://www.amazon.com/Crazy-Shoes-Poems-Brenda-Mota/dp/1541320441