Do you love the feel of printed books? If you've amassed a collection of paperbacks, hardbacks, textbooks and even audiobooks over the years and would like to swap them to read new books, consider joining PaperBackSwap.com. All you do is list what you have in your home library to swap. When another member requests it, you mail it to them and you earn a credit to choose from the 4 million available books. When you receive the book, you can keep it for as long as you want or swap it again.