Are you planning to buy it?
What's a paperback book? Did you check the dictionary? I really don't know what's the definition they have for it, but from what I understand paperback book is a book that is printed on cheap quality paper, and the price is cheaper than that of a hardcover book because of the differences in covers. Hardcover books are sometimes used as a collection. People don't normally do that with paperback books (you don't wanna look cheap and crazy, do you
). Also, most paperback books are small, pocket size. They're convenient to read while on the plane. The ink is easily smudged. The font is super small. The bottom line is it's a read-and-throw-away book to me.
Yeah, you'll return it after reading if you borrow one at the local library or bought it by accident at a bookstore. Otherwise, it's yours to keep. I keep my hardcover books as my collection whilte donating the paperback ones to the library. It's hard to keep the paperbacks for long since after a period of time the ink will start to fade due to the cheap quality paper.