Topic-adjacent, since I know this is about physical books and what to do with them... but FWIW, I found that the only way I could consume Pilgrim's Progress was in audiobook format, which was actually entirely tolerable as background listening while doing other things. I appreciated the book for the sake of cultural literacy, which is the only reason I bothered with it at all, so at least there was that payoff. But if I'd had to sit down and read the thing, I'd never have persevered.