Noughts and crosses - Malorie BlackmanSephy is a Cross: she lives a life of privilege and power. But she's lonely, and burns with injustice at the world she sees around her. Callum is a nought: he's considered to be less than nothing, a blanker, there to serve Crosses, but he dreams of a better life. They've been friends since they were children, and they both know that's as far as it can ever go. Noughts and Crosses are fated to be bitter enemies, love is out of the question. Then, in spite of a world that is fiercely against them, these star-crossed lovers choose each other.