Movie Prop ideas

[mike4bmp]

I am shooting a student film next weekend and need some ideas for a prop for one of my actresses. One of the scenes in the movie the main actress is sitting on a bench reading a book in a metropolitan park. She is a serial killer in this story....I was wondering what would be a good book for a serial killer to be reading...something ironic? Can you guys think of any books that might stand out to the audience...to give the scene an interesting touch?
Thanks!