I am a book lover, in all forms. I love the free Kindle books, but I do also love a nice hardcover book. I always liked the Bargain Books section at Waldenbooks and later Borders. We've lost both of them, so I get my fix at Amazon.
This link has some great bargain books. The first one, Dave Eggers, has one of my favorite books ever. I think it's an easy risk to take to order another of his books.
All under $5 and almost all hard covers. They'd be great for gifts.