Wish you had given away your old books that you might have read at least twice? You can do that through BookMooch
You can give away your unwanted books and also can receive books that you are yet to read. This facility is made available by Bookmooch.com by giving you points when you give away your books.
How it works:
Every time you give someone a book, you earn a point and can get any book you want from anyone else at BookMooch. Once you've read a book, you can keep it forever or put it back into BookMooch for someone else, as you wish.
You also earn points when you receive a positive feedback. Yes, it works like eBay system.
Spread the word-will you?