The Implications of Google's Digital Library
It seems to me that the publishers' claim about this is somewhat lame:
publishers shouldn't have to be the ones punished into pulling a lot of hours into explicitly drawing up a list that tells Google to back off. Google should be the one hiring lots of guys to compose a list of all books they want to index into a polite application submitted to the publishers for approval.
Well, if you don't have any idea that you own copyright on these books, perhaps those books aren't really doing you any good anyway.
"We're not aware of everything we've published," Sanfilippo said. "Back in the 50s, 60s and 70s, there were no electronic files for those books."