My advice is this. For Christ's sake, don't write a book that is suitable for a kid of 12 years old, because the kids who read who are 12 years old are reading books for adults. I read all of the James Bond books when I was about 11, which was approximately the right time to read James Bond books.
Terry PratchettRincewind tried to force the memory out of his mind, but it was rather enjoying itself there, terrorizing the other occupants and kicking over the furniture.
Terry PratchettThe conversation of human beings seldom interested him, but it crossed his mind that the males and females always got along best when neither actually listened fully to what the other one was saying.
Terry PratchettFantasy is escapism, but wait... Why is this wrong? What are you escaping from, and where are you escaping to? Is the story opening windows or slamming doors? The British author G.K. Chesterton summarized the role of fantasy very well. He said its purpose was to take the everyday, commonplace world and lift it up and turn it around and show it to us from a different perspective, so that once again we see it for the first time and realize how marvelous it is. Fantasy - the ability to envisage the world in many different ways - is one of the skills that make us human.
Terry Pratchett