Ask the publishers to restore access to 500,000+ books.
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https://keep.google.com/ | 10:03:52 May 16, 2018
Got an HTTP 302 response at crawl time
Redirecting to...
https://accounts.google.com/ServiceLogin?passive=1209600&continue=https://keep.google.com/&followup=https://keep.google.com/<mpl=keep