I've recently decided work into my reading schedule some overlooked classics. I often confuse two titles on that list, Discworld and Ringworld, though I suspect the differences will become clear once I've actually finished them.
Some unfortunate news made the distinction all the clearer today: Terry Pratchett has been diagnosed with Alzheimer's. Though the Discworld author is optimistic — "I would just like to draw attention to everyone reading the above that this should be interpreted as 'I am not dead'" — I can't help but remember the slow decline experienced by James Doohan in a similar situation.
I hope to enjoy Mr. Pratchett's books before my appreciation for his wit is posthumous.