Earlier quoted context omitted.
Can I download a book without paying for it, and print copies of it? Stash copies in my bathroom, the gym, my office, my bedroom etc. to basically have a copy on hand to study from whenever I have some free time? What about movies and music?
Yes, you're allowed to make personal copies of copyright works that you own. IANAL, but my understanding is that if you're using them for yourself, and you're not prevented from doing so by some sort of EULA or DRM, there's nothing in copyright law preventing you from e.g. photocopying a book and keeping a copy at home, as long as you don't distribute it. The test case here has always been CDs—you're allowed to make…
That’s not the point. It’s about books you don’t own. Are you allowed to download books from Z-Library, Sci-Hub etc. because you want to learn?