Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Q: Context: Queen of the Summer Stars is a 1991 novel by Persia Woolley and is the second volume of the Guinevere trilogy that relate the Arthurian legend from the perspective of Guinevere.
Question: What is the series that Queen of the Summer Stars is a part of?
A:
guinevere trilogy