Question: A Wish Way is a device that appears in three of the Oz books of Ruth Plumly Thompson, "The Royal Book of Oz", "The Lost King of Oz", and which other book?
Sentence (from "The Hungry Tiger of Oz"): The Hungry Tiger of Oz (1926) is the twentieth in the series of Oz books created by L. Frank Baum and his successors, and the sixth written by Ruth Plumly Thompson.
Relevant evidence: Yes