Also, My cousin has shared a website in which you can trade books.
"The website is called "Paperback Swap". You sign up for free, and you post books that you are willing to part with. If someone "orders" your book, you send your book to them. They don't pay you. After they receive the book you get a credit to your account. For each credit you earn, you can "order" any book. For free! They say postage on a typical paperback runs about $2.35. So, for each book you send for under $3, you get a free book. Basically you are paying postage for your books. Yay!
To ship the book, you print postage on a piece of paper, and wrap it around the book (like a present) and drop it in the mail. You don't need to buy an envelope or box or anything!"
Here is that site http://www.paperbackswap.com/index.php They also have DVD swap and CD swap.