Double Cross (ri) (Malorie Blackman)

Callie Rose knows too much - too much about violence and family feuds, and too much about Nnoughts and Crosses. And knowing so much about the past makes her afraid for her future. People always seem to want revenge. Tobey wants a better life - for him and for Callie Rose. He wants nothing to do with the violent gangs that rule the world he lives in. But when he's offered the chance to earn some extra money, just this once, would it hurt to say 'yes'? One small decision can change everything . . .'Powerful' Sunday Times 'Blackman "gets" people . . . she "gets" humanity as a whole, too' Guardian