The local library doesn't really like donations. Most get tossed. A separate charity takes them, tosses most, and conducts sales to raise money for the library with what's left.

But the fact is, if I'm retaining a copy of the book (with my scan), I can't give the book away. I still have it. That would be stealing. It is really disheartening to see people here on Hacker News who believe that intellectual property should be stolen and/or has no value. That's disturbing.