In libgen, you can search for stuff and find books/docs that match the query, but unfortunately that appears to not be possible on sci-hub, which is inconvenient.
That said, both are incredible resources for academics, researchers, students or even folks just wanting to read up on a subject in more depth than Wikipedia has.
That said, both are incredible resources for academics, researchers, students or even folks just wanting to read up on a subject in more depth than Wikipedia has.