What's your favorite fiction book and what did it taught you?
Or how have your fictional books changed you?
A common weakness of the intj personality type is emotions. Nonfiction is always the highlight when asked for books that will make you smarter. But fiction may be a way to teach empathy, compassion, emotional intelligence.
I've definitely been emotionally matured by the fiction I've read. And I've definitely learned more about life from fiction than from nonfiction books.