A comic book writer, online artist, and author of the books UnderstandingComics and ReinventingComics (see http://www.thecomicreader.com/html/icst/icst-5/rc-184.jpg and http://www.thecomicreader.com/html/icst/icst-5/rc-185.jpg for a couple sample pages from his books).
See http://www.scottmccloud.com/comics/icst/icst.html for his online-comic column "I Can't Stop Thinking!", which is a continuation of the ideas in ReinventingComics.