@tendertouch
So something like Ursula K. Le Guin's Left Hand of Darkness where gender-fluidity is the norm on the planet (can't remember the name of the planet, but not earth)? Dead tree, of course
It was pointed out to me that, of course, it's also available in ebook formats. My point was simply that it was originally print only and it's still in copyright, so ebooks should cost at least some $$.
That reminded me of another of her stories, though, that is available free and it's strange, too. The Ones Who Walk Away From Omelas is available as a free pdf in multiple places. Note, it's a disquieting story, but one we should all, maybe, read and reflect upon.