My 8yo dd is an avid reader and loved harry potter. I'd like to encourage her love of books, but i am a bit wary of content that's too old for her. She's just finished northern lights, which i let her read as she was really keen and it didn't feel right to tell her she couldn't, but i wasn't entirely comfortable exposing her to the horror of it, or of the later harry potter books. I am certainly not keen for her to read anything with teenage themes (sex etc). Are there any books that might be a similar level in terms of thought provoking themes but age appropriate?