Swap paper books with people nearby. - Simple & Free. - No registration required. All you need is a book to exchange. Scan: Scan the ISBN code at the back of the book you want to exchange and hit "Publish". Browse: See books other people want to exchange nearby and swipe up when you see a book you like. Tap to see the details. Book Match: When you get a Match you will be able to chat with the other book owner and coordinate where the swap will take place.