This question contains spoilers…
(view spoiler)[Hello, my question is: Is there anything useful in non-reading books and what is the damage from reading? (hide spoiler)]
I'm not sure I completely understand the question, but if you're asking if reading can cause damage, I would say only if you are reading (and believing) hate propaganda like Mein Kampf. The only thing useful and not reading books is if you spent the time doing something more constructive, like helping starving children.