From Works of Wonder:
"This was one of my favorite books in the series, but probably the least successful of the covers. My selection of yellow as a dominant color may be part of the reason for my dissatisfaction with the painting, as it's my least favorite color. Also, if I were to do it over I would repose the figures and do a better job of painting them. As usual though, I couldn't see any of these problems when I was working on the painting!"