I have said that His Dark Materials is not fantasy but stark realism, and my reason for this is to emphasise what I think is an important aspect of the story, namely the fact that it is realistic, in psychological terms. I deal with matters that might normally be encountered in works of realism, such as adolescence, sexuality, and so on; and they are the main subject matter of the story — the fantasy (which, of course, is there: no-one but a fool would think I meant there is no fantasy in the books at all) is there to support and embody them, not for its own sake.

Interview at Achuka Children's Books