Sky Island - Lyman Frank Baum - Bog

Trot is near her home on the coast of southern California when she meets a strange little boy with a large umbrella. Button Bright has been using his family's magic umbrella to take long-range journeys from his Philadelphia home, and has gotten as far as California. After an explanation of how the magic umbrella works, the two children, joined by Cap'n Bill, decide to take a trip to a nearby island; they call it "Sky island."