Scott Young wrote a phantastic (no pun intended) blog post on the question whether you should read more fiction. As I am a huge fiction literature fan myself, mostly phantasy, I can only agree to all of his points. For me fictional books increase my thinking and take me away from problems I face in real life. That doesn’t mean that I’ll ignore them, it just creates a "happy place" where I can relax and regain my strength.
Good fiction has a far broader range of guiding philosophies. The Fountainhead centers around the virtue of human selfishness and ego. [...] The stories that guide these books center around completely different ways of viewing the world.