Loads of children read books about dinosaurs, underwater monsters, dragons, witches, aliens, and robots. Essentially, the people who read SF, fantasy and horror haven't grown out of enjoying the strange and weird.
China MievilleKraken' is a very undisciplined book. That's a gamble. If it doesn't come off, it's disastrous. But there are pleasures, I think, to a meandering lack of discipline that you can't get the other way, and vice versa.
China Mieville