I'm looking for some suggestions for some novels for my son, who's 7 years old. He's kind of nailed reading and has no trouble with parsing and understanding pretty much anything we give him targeted at kids to teenagers, but the trouble I'm having is that while his reading skills are solid, his maturity is still that of a 7-year-old. I'm looking for something that can challenge him technically, but isn't pushing into teen/YA level subject matter. He's not interested in romance, horror, or coming-of-age style subjects, but his ability is at the level in which those subjects are ubiquitous.
Ideally I'm looking for some suggestions with a boy protagonist as well. We've got no issues with girl protagonists, he's read and enjoyed many different novels with strong female leads and we encourage it, but he loves adventure books, especially fantasy, and in that genre we're kind of struggling to find many contemporary novels with a male protagonist. Definitely open to suggestions with female protagonists as well though.
by Acceptable_Durian868