Never has a book physically affected my mood or attitude. I realized that while I read this book I become more irritable, more moody, and frankly hyper-sensitive to the evil that surrounds each page.
This doesn't stop me from reading. In fact, it causes me to read quicker, just to get through it. I highly recommend this book to anyone, but don't enter into the story blindly. Realize that you're about to read a story of hate, injustice, brutality. (Hmm, really makes you want to run right out and buy it I bet.)