If there is a bike in a yard and someone who does not own the bike tells a passerby it is okay to take the bike, how many people committed the theft?
If the new 'owner' uses the bike for a paper route to earn money, who does the earnings belong to?
What if it isn't a bike that is taken, but words in a book?
I don't understand how a library (or anyone) can give permission for a book to be scanned by someone else to use to generate (lots of) money, and not think there was anything wrong in what they were doing. (Think about the forces and motives involved.)
There is a huge difference between buying a book and buying the rights to a book. Only people with the rights to a book can assign those rights to another party.
Serving notice: My copyrights are enforced.