Noughts + Crosses by Malorie Blackman

Excellent condition

Sephy Hadley and Callum McGregor have been friends since childhood, and they both know that's as far as it can go. Theirs is a world full of prejudice, fear and mounting violence - where Noughts and Crosses are fated to be enemies.

Then, against all the odds, these star-crossed lovers choose each other.

But this is a love story that will lead them both into terrible danger ...