I admit - I do the same thing.

I read a lot. I buy a lot of books. I end up with a lot of junk.
I'm drowning in books. I have nearly 200 to give away on paperbackswap and people don't want them.

So, if I can't give them away, I save them and burn them periodically. If they are so worthless, why donate them? They just have to pay the dump to take them, so it hurts charity to donate worthless books.

Burning Books - I do the same thing....