1.   His note-book and the library books were piled neatly on the stone with the wire and cutters.

2.   When are the library books due back?

3.   When do the library books have to be turned in?

4.   The library books are overdue.

5.   Did you get the library books back?

6.   Plus people just give the library books.

7.   The library books were several days overdue.