I’m horribly saddened by this. He’s long been one of my favorite writers, whose novellas – in particular, my personal favorite, “Viator” – are some of the best I’ve ever read. I never met him, and he had no idea who I was (he always called me Lisa!), but he was very sweet to me in our few interactions on Facebook, and I appreciated that.

Michael Swanwick has a wonderful eulogy here.