Best Middle Grade Graphic Novel Series

The best middle grade graphic novel series work to keep readers engaged — like any other tween series — because they’re already oriented. They know the characters and the world in the particular series, so it’s easier to keep going. So while I already have a list of middle grade graphic novels, I thought it would be fun to keep all of the series in one post! That way, readers strictly on the hunt for series will find them without hassle.