A lot of the books come from libraries, which already have them well cataloged, so it's a shame that existing catalogs, helping to lend order to the books, isn't transferring to Google. 

Here's a nice book on uncommon birds with many color plates inside:
http://books.google.com/books?id=L2sFAAAAQAAJ

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon