If It's Hard to Read, Is it Still Good?

I don't know how a book can be hard to read, unless it's in a different or early language like Chaucer or Shagspare.

Books can be hard-going and turgid (Pilgrim's Progress) or boring (On The Road), but I don't see how they can be hard to read.

I can read. Can't you?

My experience of reading has taught me that there are four kinds of book.

1) The reading experience is wonderful and the book resonates with you long after you've finished (this is the rarest form of literature. The holy grail).

2) The reading experience is enjoyable but the book does not resonate with you after you've finished. (many modern books seem to be like this. At first glance, good, but with time, you begin to recognise its lack of significance).

3) The reading is experience is terrible but the book resonates with you after you've finished (unpleasant to read but the themes and ideas stayed with you).

4) The reading experience is terrible and the book doesn't resonate either (the worst possible outcome. Thankfully rare.)