A writer so full of strength and creativity, he seems unfailing. I only hope the condition progresses with great slowness. That could happen. Best wishes, of course, to him and his family.
Thanks to andyduckerlinks for the info.
ETA - I only logged in a for a few moments, and now I've had a chance to take a bit longer to read lj I see that several friends have posted this news. I won't delete this post, but I'm sorry if this has cluttered up f-lists. I normally take longer to post news but this caught me off-guard. I've been listening to a lot of the discworld stuff lately.