The Wonderful Wizard of Oz is a children's novel written by author L. Frank Baum and illustrated by W. W. Denslow. It is the first novel in the Oz series of books. A Kansas farm girl named Dorothy ends up in the magical Land of Oz after she and her pet dog Toto are swept away from their home by a tornado. Upon her arrival in Oz, she learns she cannot return home until she has destroyed the Wicked Witch of the West.