No, you don't get it. They never said that they've got nothing to hide. So the rule must be that if you've got nothing to hide, spying is okay. But if you have something to hide, it's not okay. That means that it's okay to spy on you, but not okay to spy on criminals. Huh. This rule seems rather useless.
Regarding the sources for books, you've gotten a lot of recommendations already. Loading them onto the kindle is super easy. You cannot only transfer via USB, your kindle even gets it's own mail address you can then just mail your books to and have them converted and transferred by Amazon.
Meta has this dangerous mentality that they are above the law anyway, so whatever they say, until a government powerful enough to really make them pay steps up and shows them that they are in fact not above the law, they'll just fucking do whatever they fucking want.
Depends. Do you have something in mind that involves your penis: Not yet, keep it in your pants.
If you hadn't anything about your penis in mind: Do not tell her anything about your penis right now.
For anyone struggling with this, two hints that might help you frame your role better:
Listening is the solution. By trying to solve what your SO told you, you are actually trying to solve the wrong problem. Their real problem is that their brain needs to say things aloud to someone in order to correctly process it's own thoughts. Therapists make a frickin' living off of that quirk of our brains and it's the actual problem they come to you with. Even better: By listening you can not only advise on solutions, you can be the solution! Neat, huh?
Listening and solving aren't mutually exclusive. If you stick to listening first, your SO might actually come to a point where your advice is wanted. Pro tip: Once their thoughts slow down, ask if they want to hear what you think about the issue. From my experience, the answer will be "yes" very often. That way, your thoughts will actually reach your SO and not get blocked by frustration outright. Yet, as with everything else: No means no. So if you get a no, don't try again, shut the fuck up, alright?