1. Paperback books have soft covers.

2. They wrote long, bestselling paperback books about them.

3. They are often cheap-looking paperback books, usually in series with names like Sweet dreams, Teens, Couples, and Plus.

4. I headed to New York and became a sales rep for a paperback book company.

5. There are shelves on another wall for about three hundred paperback books.

6. They were covered with ugly new paperback books and piles of papers.