Read the dialogue and choose the right answer below.

Book seller: Good morning! Can I help you, please?
Customer: Good morning! I am looking for some books.
Book seller: What kind of books are you looking for?
Customer: I need to buy a classic book and a modern book for my project.
Book seller: Do you have any particular choice?
Customer: Yes, I want to buy the book named "Harry Potter and the Chamber of Secrets" by J.K. Rowling and "Don Quixote" by Miquel de Servantes.
Book seller: Here are the books.
Customer: Thanks. How much do they cost?
Book seller: They cost only one hundred pounds.
Customer: Here is the money.
Book seller: Thank you. Please visit us next time. Good bye!
Customer: You are most welcome. Good bye!

The customer wants to buy ... books.