John Updike

I'd say Harvard graduates leave here with a sense of the possible and the limit - and a sense that there are no limits to what humans can do and that you can always be pushing, whatever limit you think might be there.

'Star Wars,' 'Doctor Who,' 'Forgotten Realms,' even 'Firefly' and 'The X-Files' have shared world novels and other media. I can't help but notice these settings have large shelf space in bookstores, so their publishers and authors are getting something right.