What else do they read? I have a reluctant reader of fiction on my hands. He reads a lot of fact books but I find it hard to get him interested in fiction.
He has, however, devoured the treehouse series, and is now rereading them for the third time! So any other similarly silly recommendations would be great. We've tried Tom Gates which he did read, but he wasn't that fussed. He likes Harry Potter, but I'm reading them to him as I don't think he'd manage the language and themes on his own.
He's 8 by the way. Not a super advanced reader but pretty competent I think.