Spirits of Flux and Anchor

I read this back in the early 80s when I was being introduced to fantasy and had not yet come across science fiction. Rereading it now, I see what I like has changed considerably and won't remain in my collection.

It has some interesting concepts around the creation of reality, and it interestingly is well ahead of its time in exploring sexual identity! However there's something about the ?maturity? of the writing that doesn't compare to the books I love to reread.