Book lovers' shelves tend to be bending under the strain of mammoth collections. You don't want to give them away to people who wouldn't care for your precious reads but you've also got too many, and you want to read more! The solution is Read It Swap It – a site that lists over 200,000 books of all genres available for swapping. Just enter the ISDN codes of your books to register yours. The only cost is postage between people.