L. Frank Baum 
The Road to Oz (Illustrated) 

Dorothy meets the Shaggy Man, and while trying to find the road to Butterfield, they get lost on an enchanted road. As they travel they meet the rainbow’s daughter, Polychrome, and a little boy, Button-Bright. They have all sorts of strange adventures on the way to Oz. In which is related how Dorothy Gale of Kansas, The Shaggy Man, Button Bright, and Polychrome the Rainbow’s Daughter met on an Enchanted Road and followed it all the way to the Marvelous Land of Oz.