Blood - Tony Birch

From the moment he saw Rachel wrapped in a blanket at the hospital, Jesse knew that he'd be the one to look after his little sister. When their mother's appetite for destruction leads the little family into the arms of Ray Crow, Jesse sees the brooding violence and knows that, this time, the trouble is real. But Jesse is just a kid and even as he tries to save his sister, he makes a fatal error that exposes them to the kind of danger from which he has sworn to protect them. As their world is torn to pieces, the children learn that when you are lost and alone, the only thing you can trust is what's in your blood.