Author Terry Pratchett is suffering from a rare form of early Alzheimer's disease, it has been revealed.
He said: "I would have liked to keep this one quiet for a little while, but because of upcoming conventions and of course the need to keep my publishers informed, it seems to me unfair to withhold the news.
"I have been diagnosed with a very rare form of early onset Alzheimer's, which lay behind this year's 'phantom stroke'."
Perhaps unsurprisingly the great man himself is still upbeat:
PS I would just like to draw attention to everyone reading the above that this should be interpreted as 'I am not dead'. I will, of course, be dead at some future point, as will everybody else. For me, this maybe further off than you think - it's too soon to tell. I know it's a very human thing to say "Is there anything I can do", but in this case I would only entertain offers from very high-end experts in brain chemistry.