For the Love of Books
I love books. I love reading them, and collecting them, and saving them from landfills. Today I received new (to me) books from http://betterworldbooks.com Used books in great condition, plus proceeds from sales get donated to literacy programs. Yes!
Steepshot
I also like what I've read about Better World Books. I've purchased a few of their books through their ebay store, but I will probably also be buying directly from them.
I haven't had any issues with them so far. Sometimes it takes slightly than longer for a book to arrive but it's usually worth it to me.