You could try any one of these three as a guage comments:false, rating:false or isbn:false in the search bar. All books without comments, ratings or isbn would show up.
Or do all three at once.
rating:false and comments:false and isbn:false
This would probably show books for which you haven't even tried to get metadata.
Last edited by DoctorOhh; 02-21-2011 at 11:11 PM.