Well, I don't know how easy this one will be, but this is a book I have just read today. In fact, I've spoilt it in another thread. But here is the line on the back (and the first lines of the book) anyway, because it's a hilarious one.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways- with relief or with despair. Only Skagra responded to it by thinking, Wait a second. That means there's a situation vacant.
I've lived for over 2000 years, and not all of them were good ones. I've made many mistakes. And it's about time I did something about that.
-The Twelfth Doctor, Doctor Who: Deep Breath