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|title=Double Cross (Noughts & Crosses)

|author=Malorie Blackman

|date=November 2008

|isbn=0385615515

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Only Callie Rose knows the truth - the bomb that killed her grandmother wasn't the work of a Nought terrorist. She made it herself. And it haunts her; she's unable to let it go. Her best friend Tobey tries to help, but he's caught up with worries of his own. A Nought boy at an exclusive Cross school, Tobey has dreams of going to university and getting out of the cycle of poverty and violence. But he's finding escape almost impossible. Rival gangs are tearing up the neighbourhood and it's impossible to not ally yourself with one or the other. And he's tempted. If he could just earn some money making one or two deliveries for McAuley, he could buy Callie Rose a birthday present.