I believe that this is a good thing for book authors and publishers and that Google will prevail. However, the fact that it is difficult to contact the authors on this is no excuse for copying their intellectual property. The words in a book have a value other than commercial for its author. So seeing your work being copied with the permission of a third party (a library) is a strike below the belt. I think fundamentally, the issue here is that libraries categorically DO NOT have the legal right to authorize the copying of a book. This is clearly stated near the front of every book. As history will have it though; a little piracy and a few lawsuits are always neccessary to fuel a new industry based on copyright. This is all just a teething process.