My favorite rubric for this is: give yourself permission to put the book down and never pick it up again at page (100 - your current age). Which means that, yes, once your turn 100, you're allowed to judge a book by its cover.

One of the books I most strongly remember giving up on was “Infinite Jest”. I only got through a few pages and trying to read it just made me really angry. I don’t remember why exactly, but I remember very strongly that it was so unpleasant and annoying for me that I absolutely did not want to read any further. Regardless of how important this book may be according to some. I have no intention of ever picking that book up again. I might miss out on something, but I’m fine with that. There are plenty of other books to read.

Brilliant