Better World Books collects books from university bookstores and libraries and resells them, donating an average of 10 percent of the price of the book to nonprofit literacy groups–Books for Africa, Room to Read, World Fund, and National Center for Family Literacy.
Here’s a link to their website. The company raised a total of $4.5 million in its first round of financing, which was led by Good Capital. Here’s a link to the news story on CNET.