I’ll go with the low-hanging fruit: Mein Kampf. I’ve read it, cover to cover. As a piece of propaganda, it’s good. As an example of good writing? Absolutely not (though I will admit I have only read it in translation). Oh, and the whole fascist, racist, and generally shitty worldview of the author that he infuses into the text. And the fact that the author is literally Hitler. You 5-star that book? You’re a Nazi. Period. And as a Jewish person, I don’t look too kindly on them.
Why would Ready Player One make you cautious?
Off the top of my head:
The treatment of female characters is questionable - primarily the love interest.
The prose is just not that good.
The constant nostalgia bait and over explanation of references.
It’s for people who like pop culture and are delighted by the endless references in the book, as a media-loving manchild myself if someone said that Ready Player One was a 5/5 then I’d think they were a boring person lol.
Also the Midnight Library sucks lol. How to Stop Time is a infinitely more interesting book.