Sarah Monette's (<lj user="truepenny") Doctrine of Labyrinth books feature two main characters who would probably be considered disabled. Mildmay has a physical injury that he has had to learn to live with and Felix - ok, here is where I realize I do not actually know the appropriate terminology for this aspect, but some combination of life-induced PTSD and magically-induced Other Issues that change his ability to function. And that is really clunky sounding and is ringing kind of false to my mind but I can't find a better way to phrase it right now, so I would like to apologize if I've said anything poorly here. I'm pretty sure I've seen Monette talk about this in her blog at some point, but it might have been a few years ago. She handled the issue in the books, in my decidedly non-expert opinion, very mindfully.