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.
"What have you been doing since you stole that antique TARDIS of yours, since you first landed on Skaro? Shouting 'Look at me!!! I'm not fighting a war!', while you battle the Daleks all the way through space and time."