He did a collaboration with Stephan Pastis (Pearls Before Swine) a few years ago: https://stephanpastis.wordpress.com/2014/06/07/ever-wished-that-calvin-and-ho

He did a collaboration with Stephan Pastis (Pearls Before Swine) a few years ago: https://stephanpastis.wordpress.com/2014/06/07/ever-wished-that-calvin-and-hobbes-creator-bill-watterson-would-return-to-the-comics-page-well-he-just-did/ https://stephanpastis.wordpress.com/2014/06/07/ever-wished-t...