Fantasy is not antirational, but pararational; not realistic but surrealistic, a heightening of reality. In Freud's terminology, it employs primary not secondary process thinking. It employs archetypes which, as Jung warned us, are dangerous things. Fantasy is nearer to poetry, to mysticism, and to insanity than naturalistic fiction is. It is a wilderness, and those who go there should not feel too safe.
Ursula K. Le GuinThe label YA actually means nothing except that the protagonists, or some of them, are young. Publishers like it because it is a secure marketing niche. But the cost of security is exclusion from literary consideration.
Ursula K. Le Guin