Sky Island, Being the Further Exciting Adventures of Trot and Cap'n Bill After Their Visit to the Sea Fairies

According to Wikipedia: "Lyman Frank Baum (1856 – 1919) was an American author, poet, playwright, actor and independent filmmaker, best known today as the creator, along with illustrator W. W. Denslow, of one of the most popular books in American children's literature, The Wonderful Wizard of Oz, better known now as simply The Wizard of Oz. He wrote thirteen sequels, nine other fantasy novels, and a plethora of other works (55 novels in total, 82 short stories, over 200 poems, an unknown number of scripts, and many miscellaneous writings), and made numerous attempts to bring his works to the stage and screen.