The only genre of books where this has a chance of being true are non-fiction books and maybe classic fiction books that aren’t that pleasant to read but impart good lessons.
Also: bad books, where the lesson to be imparted is “This book sucks, don’t waste your time on it”. Or: “Book Y covers the same stuff but much better.” Which are valuable lessons if you were considering reading book X.
Also: bad books, where the lesson to be imparted is “This book sucks, don’t waste your time on it”. Or: “Book Y covers the same stuff but much better.” Which are valuable lessons if you were considering reading book X.