But you will recognize some other acquaintances in "Sky Island." Here, for instance, is Button-Bright, who once had an adventure with Dorothy in Oz, and without Button-Bright and his Magic Umbrella you will see that the story of "Sky Island" could never have been written. As Polychrome, the Rainbow's Daughter, lives in the sky, it is natural that Trot and Button-Bright meet her during their adventures there.
This story of Sky Island has astonished me considerably, and I think it will also astonish you. The sky country is certainly a remarkable fairyland, but after reading about it I am sure you will agree with me that our old Mother Earth is a very good place to live upon and that Trot and Button-Bright and Cap'n Bill were fortunate to get back to it again.
By the way, one of my little correspondents has suggested that I print my address in this book, so that the children may know where letters will reach me. I am doing this, as you see, and hope that many will write to me and tell me how they like "Sky Island." My greatest treasures are these letters from my readers and I am always delighted to receive them.
L. FRANK BAUM.