What concerns me are the books rated excellent that are not. I realize this is a somewhat subjective rating, but when I read "almost no errors" I would like to believe it. I am reading a book right now that in my opinion should have been rated "good. It is readable but contains a number of errors, a duplicate page and a lot of extraneous characters. And then I have to question how much the validator did and whether quality was taken into consideration at all. Hopefully this book was not scanned recently and that scanning has improved since then which I believe it has. -----