Ros is in the books. Yes, they are full of gratuitous violence, just not as much gratuitous T an A. Yes, I have read them.

I've noticed that the HBO version of GoT lets no opportunity pass for gratuitous sexual violence. In the book, "Ros", the prostitute, spies for Littlefinger, and has a role in court intrigue. In the TV series, there is a very graphic picture of Ros, nude, tied up and murdered by Joffrey's shooting her with arrow.