I wish books had some kind of rating like films. Are Philip Pullman's Sally Lockhart books suitable for a 9 year old? And how about the vet books (James Herriot)? I'm not worried about reading ability, but I'm forever getting caught out by books I remember as being clean (like Mma Ramotswe having been raped). In general I find pre-Lady Chatterley are safe, but would like to add a bit of variety to the birthday list!