"The Wishing Horse of Oz" by Ruth Plumly Thompson is a fantasy novel published in 1935. When King Skamperoo uses enchanted emerald necklaces to wish for a horse, the talking Horse Chalk falls from the sky—sparking an audacious plan to conquer all of Oz. Soon, magical forces cause everyone to forget their rightful rulers, leaving only Dorothy and a flying pig to remember Princess Ozma. Together they must unravel the mystery of the wishing necklaces and rescue Oz's true leaders from their hidden prison. (This is an automatically generated summary.)