I saw this question posed recently at Reddit I think:
The internet is scheduled to go down forever. You have a week to prepare and download anything from the web you think is necessary to have for the rest of your life. What do you download and why?
As usual, there were a lot of flippant answers to what could be a prompt to a serious exercise in practical survival.
I took note of just one comment, that suggested the following work that might be done in the week before the Internet went down: Download every book from the Survivor Library (a portion of which appears below.) It’s worth a look. I’d suggest you not attempt to print it all.
Holy moly Fred. We go back to old fashioned libraries.
I poked around a bit and there is more at that site that appears at first glance. Google has about 10,200 pdf files indexed, and they sell copies of the library for offline use - so me robotically downloading it all would not be cool - although I suspect there may be over 100 GB there so that probably isn't practical anyway.