Here we have a photo of artist Bill Watterson and in this article, about as much info about the creator of Calvin and Hobbes as we're likely to get from a reporter.
I am told that copies of the newly-released Complete Calvin and Hobbes have been flying off the tables at Costco, and are presumably being snatched up at other stores, as well. A friend of mine who's a huge fan of the strip told me he was hoping the book would sell poorly. His logic was that the more money Watterson makes off it, the less likely he is to ever come back and do it or something else again. My impression of Watterson, based on the one phone call we had years ago and on a long chat with an exec at his syndicate, is that he's not out to see how much cash he can make in this world. So you can probably buy this new collection without fear that you're depriving yourself of future Watterson work.
(P.S. If you want to buy this book from Amazon, here's a link and it's one of those that will pay me a slight commission. They have it for $94.50 plus postage. If you're a member of Costco, their website sells it a bit cheaper but I don't make anything off it. My friend Gordon Kent told me that it was eighty bucks plus tax at his local Costco. It's probably about the same at a Sam's Club.)