The Wishing Horse of Oz

The Wishing Horse of Oz (1935) is the twenty-ninth book in the Oz series created by L. Frank Baum and his successors, and the fifteenth written by Ruth Plumly Thompson. It was illustrated by John R. Neill. The novel was followed by Captain Salt in Oz (1936). This entry marked the point at which Thompson had written more Oz books than Baum.

This Oz mystery starts in the small, poor kingdom of Skampavia, where King Skamperoo wishes for a horse using enchanted emerald necklaces. When Chalk, a talking Horse from Oz, falls from the sky, Skamperoo decides the emeralds must be from the Emerald City, and decides to conquer all of Oz. He magically causes all the residents of Oz to forget their rightful rulers and accept him as their emperor instead. Only Dorothy and Pigasus, the flying pig, are able to remember Princess Ozma, the true ruler of Oz, and together they set out to rescue her. The mystery in this story is how to make the necklaces grant wishes, which only the horse Chalk knows how to do.

This was the last Oz book to feature illustrations in color, and only the first edition and the International Wizard of Oz Club edition (1990) have them.

Reception
Samuel A. Kaufman in the Brooklyn Times Union gave the book a negative review, saying, "The magic charm of the original Oz is not there... There are too many characters, too many complications, too much machinery — and too much book. It is insufferably padded." A more generous reviewer in the Columbia Missourian wrote, "Children who like beautiful things, lovable and unusual fairy people and animals, and a really important mystery will like The Wishing Horse of Oz. I can't tell you enough nice things about it."

Copyright status
This book, along with Thompson's next four, did not get renewed for copyright, making them public domain and freely readable online.