One of my favorite online booksellers:
Better World Books is on online used book store with a heart. A portion of the proceeds from your purchase is put towards helping literacy programs around the world. In addition, for every book purchased, they promise to donate a book to either Books for Africa or Feed the Children. Their business model not only aids literacy around the world, but also saves books from landfills. Whenever I'm looking for a particular title, this is where I like to look first. The book's condition is noted in the description. You'll know whether there is extensive highlighting or if it's a former library book.
They have a wide selection with great deals and fast shipping.
But my favorite part of the buying experience is that when your order ships, you receive a creative e-mail confirmation written from your book's point of view. Try ordering from them and you'll see!
