Books for the Course

Felix: Excuse me. Could you help me find some books?

Librarian: Of course. What do you need?

Felix: I have a course on rivers. Here is my list.

Librarian: Are these the books on your list?

Felix: These two, yes. But not those.

Librarian: Those are for a different course. They are on the wrong shelf.

Felix: Thank you. I have a test next week.

Librarian: Then take this one too. Many students use it to study.

Felix: Perfect. Now I have everything.

Librarian: Good luck with the test.