I think I’ve very rarely not found what I was looking for (for non-academic stuff). As your other reply recommends, I’ve heard good things about Anna’s archive too!
Not to my knowledge but pretty much all the books they sell are already available somewhere
Personally I use libgen and that’s served me well for the past decade or so
I expect most of them are available via annas archive or getcomics
I nearly always find them on zlibrary, to be honest.
I've never used zlibrary, just libgen. How would you compare the selection in your experience?
Try Annasarchive.org
I think I’ve very rarely not found what I was looking for (for non-academic stuff). As your other reply recommends, I’ve heard good things about Anna’s archive too!