Rinkitink in Oz Author:L. Frank Baum The blue pearl gives strength, the rose pearl protects form danger, and the white pearl talks-only words of wisdom, of course! With the three pearls, Prince Inga and his friend Rinkitink hope to rescue Inga's parents, who have been captured by the Nome King. Dorothy looks in Ozma's Magic Mirror and sees Inga and Rinkitink in trouble.