Question: Jinnicky the Red Jinn makes a cameo in which twenty-ninth book by L. Frank Baum and his successors?
Sentence (from "Jinnicky the Red Jinn"): (He makes a cameo appearance in "The Wishing Horse of Oz", and he is the principal pre-existing character in Thompson's sub-canonical penultimate Oz book, "Yankee in Oz").
Relevant evidence: Yes