"Another way to talk about the richness and complexity of picture books is to notice how they differ from illustrated books. In the illustrated book, an image on the opposite page shows, more or less, what is happening in the text; the illustration is an aid to imagining but not necessary. But in the very best picture book, image and text are essential to each other and interact."
"Neither the words alone, nor the picture alone, is sufficient. Separately, each tells a different story. Together, they mean something more."
GRISWOLD, J. How Picture Books Work [Online]. Parents' Choice: Children's Media & Toy Reviews. Available: http://www.parents-choice.org/article.cfm?art_id=306&the_page=reading_list [Accessed 12 November 2010].