Some of the great genii of American literature are famously recluses. There is Pynchon, of course, Don DeLillo (to an extent), the late Mr. Salinger, and, of course, the great Bill Watterson. I am a strong admirer of his work, so I was glad to find this very recent interview (Feb 01, 2010) with the Cleveland Plain Dealer. Here is the direct link, and here is an excerpt:
I just tried to write honestly, and I tried to make this little world fun to look at, so people would take the time to read it. That was the full extent of my concern. You mix a bunch of ingredients, and once in a great while, chemistry happens. I can’t explain why the strip caught on the way it did, and I don’t think I could ever duplicate it. A lot of things have to go right all at once.