We have a lot of books here too, some of them are really special, others not so much.
I suppose it is a TV show after all about tidying up. Wouldn't be much of a tidy if nothing changed.
It's like anything on TV, you take from it what you will.
We all see things differently and there appears to be strgin opinion when it comes to books, I remember I had a novel that was so heavy I found it difficult to hold to read in bed at night, so I ripped it in half, seemed logical to me, my mother in law nearly had a fit as she saw books as sacrosanct.