All seems to be as it should in the library; however, those in search of particular titles might have a difficult time scouring the shelves.

Even though books are checked out of the library every day, four books in particular are nowhere to be found. If you need of one of these books for a homework assignment, you will be out of luck as their spots remain vacant.

It is a possibility that someone checked out one of these books, so asking the librarian might be beneficial so you can get in touch with the borrower. But it'll be rather puzzling when the records won't indicate that these books hadn't been checked out.

Where could those books have wandered off to? It wasn't that common for books in the library to go missing, was it?