The Great Exchange Bookstore
With three locations in San Antonio, this convenient bookstore is becoming a favorite among locals. They carry both gently-used books as well as new titles. Their staff is very friendly and, unlike some shops, knowledgeable about what they have on the shelves. What's cool is if you don't want to purchase a hardback but also don't want to wait for the book to come out on paperback to read it, you can rent the hardback for just five bucks for two weeks. For a small fee, you can also trade paperbacks within the same category.