Been a qhile since I’ve read it, so I’m not fully certain. I believe it’s fine, but if you’re uncertain maybe wait a year. The similarities to Harry Potter aren’t too big, so I don’t think that is much of a factor. Then again, it has much more action than Diary of a Wimpy Kid.

Keep in mind as well that age appropriateness can change from kid to kid. It kinda depends on what things he’s been exposed to and been fine with in other media (i.e. Movies, games, etc.). Our input should help you make a decision, but we can’t make the decision for you.