Joshua Hutchinson writes:
From: "Jeroen Hellingman (Mailing List Account)" <jeroen.mailinglist@bohol.ph>
The quality of the scanning work is often not very good
How responsive is Google to reports of missing/obscured pages? For instance, when I've found similar issues at Cornell's digital archives, the most I've received back is a "Thanks for letting us know" and nothing ever got fixed. (And I don't always even get the "thanks" reply)
I know of at least one case where I reported a bad page, and Google rescanned the book. Unfortunately, the rescanned book also had errors, albeit different from the errors in the original scan. I haven't gone back and checked all of the books for which I've reported errors. It took about 2 months for them to rescan the book, if I recall correctly. Not all of the full view books are available as PDF downloads. I'm not sure if the are in the process of producing PDFs for all of the books or if they've just produced them for recent scans.