Is it ensure, insure, or assure?
(1900) A book by the American author L. Frank Baum. Dorothy, a little girl, is carried by a tornado from Kansas to the enchanted land of Oz. Dorothy has three companions — a scarecrow who wants brains, a woodman made of tin who wants a heart, and a cowardly lion who wants courage. The wizard pretends to give these things to them, although they have had them all along without knowing it. Dorothy eventually returns to Kansas by using magic shoes.
Note: Although The Wonderful Wizard of Oz continues to attract readers, it is better known through its 1939 film adaptation, The Wizard of Oz, with Judy Garland as Dorothy.