Can you throw away a book?
Once I finish a book and don't have room for it any longer, I simply can't toss it in the trash. It's like destroying or throwing away knowledge.
I always look for a good home for it. Usually by donating to a library when I have no more room for it.
In my life, I've only thrown one book away, and that's because it was in such incredibly poor shape no one else would have ever wanted it.