The noughts and crosses sequence /
Blackman, Malorie.
Blackman, Malorie.Noughts & crosses.
Blackman, Malorie.Knife edge.
Blackman, Malorie.Check mate.
Blackman, Malorie.Double cross.
London : Corgi,
[2012].
Title from slipcase.
In slipcase.
Noughts & crosses. Originally published: Doubleday, 2001 -- Knife edge. Originally published: Doubleday, 2004 -- Check mate. Originally published: Doubleday, 2005 -- Double cross. Originally published: Doubleday, 2008.