Finding good books for my 10 year old daughter?

My daughter loves reading, something I really want to encourage! I am trying to find some good books for her that will keep her interested, but I am struggling. She is an advanced reader for ten, but I'm a bit wary of books aimed at 13+ years because of content she might not be ready for (although she is quite emotionally/empathetically mature, if that makes sense?!) any suggestions for goodies would be really appreciated!