The fact "a bookshelf is for those who have at least fifteen books." is illustrated with the story:1. I like to read.2. I buy a lot of books.3. I have so many books, I had to buy bookshelves to keep all my books off the floor.4. Of course, if you don't have at least 15 books, your bookshelf will look empty.5. Keep this in mind before buying a bookshelf.