Shop here for every genre of new and used book and you won’t just enjoy super-low prices—the company will donate a book to someone in need for every title you buy (more than 12 million so far). BetterWorld.com deals include their bargain bin, where you can find books for just a few bucks, and up to 90% off textbooks. Interested in news and BetterWorld.com coupons with your philanthropy? Subscribe to the newsletter.