Is the book clear and significant?

The message works on different levels. Children tend to understand the good vs evil motif as well as internalize the core emotions of the main characters. Good and Evil are literally and figuratively diametrically opposed to each other in The Wonderful Wizard of Oz. There are two Wicked Witches and two Good Witches. They reside across from each other on the geographic axis of North, South, East, and West. Adults can understand this on a more figurative level. Themes like virtue, facing fears, ans sacrifice are clearly established.