Imagine a sure fire mini mentalism act that fits into your pocket. You can do it close up or even on stage!
Your spectator selects a random page and think of anything. From a number, a shape, to the taste of an item the smell of an item, or even movements. Anything your spectator is thinking of, you look directly into her eyes and tell her. It's a mind blowing miracle that works 100% of the time, extremely easy to d, and fits in your pocket.
What are you waiting for?