"Though Tehanu is named for the child character, neither it nor the two books after it are books “for children” or definable as “young adult.” I had abandoned any attempt to suit my vision of Earthsea to a publisher’s category or a critic’s prejudice. The notion that fantasy is only for the immature rises from an obstinate misunderstanding of both maturity and the imagination. So, as my protagonists grew older, I trusted my younger readers to follow them or not, as and when they chose. In the PR-driven world of publishing, that constituted a real risk, and I am very grateful to the editors who took that risk with me."
January 1, 1970
https://en.wikiquote.org/wiki/Ursula_K._Le_Guin