What should I do with my old books except from giving them away, selling, burning them?

I guess it depends. However old books if they aren't wanted can be awesome to rip out pages and use as wrapping paper for smaller gifts. There are numerous things one can do with the paper and I have seen some amazing creations on the internet. Some people even fold down certain pages and create different images that pop up. If you aren't into crafts or things, you could shred them and use as compost in a garden.