Question: How many books in the wizard of oz?
Answer: fourteen
Disambiguated annotations:
qaPairs: question: How many books are in the original and canonical Oz books by L. Frank Baum?
answer: 14
question: How many books are in the Wizard of Oz, including all story compilations?
answer: 18
question: How many books are in the Wizard of Oz, including all story compilations and works that are not Oz stories, but are set in the same universe and contain character crossovers?
answer: 24