If she loves the Warriors graphic novels, would she try reading the regular Warriors series?

My DS5 has been capable of reading novels for a couple of years now but doesn't, and I'm assuming it's just a developmental thing. He also prefers books with illustrations, but not because he can't picture the story (I read the Warriors series aloud to him at night and he LOVES it). He just loves illustrations. He devours comic books and graphic novels, including the Warriors graphic novels, and loves to illustrate everything he writes. Even his teacher has commented on it. He's probably the only kid in his class who loves to illustrate his math problems!