Is it permissible to read romance books?

I love reading fiction books as entertainment. Unlike others, I tend to avoid watching TV, and instead read books which have numerous educational benefits. I read a variety of fiction novels, but I tend to sway towards romance books sometimes. I just wondered if it is fine to read such books. It's not as if I act upon these books at all in reality, I just like reading about them and following the plot storylines. So, my question is: Is it permissible to read romance books?