Note from Keith:  When I started this painting, I didn’t know what a mule looked like.  I thought mules and donkeys looked the same.  They don’t!  I visited several farms and took pictures of what I thought were mules, only to discover later from the art director that they were actually donkeys.  It was important to the story that the cover show a “mule.”  After much pulling of hair and gnashing of teeth, I finally discovered the difference between the two.  A mule looks almost exactly like a horse, except for its head.  By the way, there are no mules in southern Wisconsin.  I know.  I looked!  I finally found a photo of a mule’s head and put it on a photo of a horse’s body.  You learn something new every day.