A love like blood - Marcus Sedgwick

If life has taught me one thing, it is this: that the worst monsters are entirely human.

It began in a hole in the ground, in Paris, in the days after the liberation. What I saw there I saw only for the time it takes a match to burn down, and yet it decided the rest of my life.

I tried to forget it at first, to ignore it, but I could not. It came back to me; he came back to me. He hurt people I loved... And so I took the first step on a journey from which there would be no return; a path that led me to fear, to hatred and to revenge - but, above all else, to blood.