Blackman, Malorie. <br/><br/>
Checkmate. 

 - London :  Corgi Children's,  2006. 
 - 510 p. 
 - Noughts & crosses trilogy .
<br/><br/> Originally published: London: Doubleday, 2005. 
<br/><br/><label>ISBN: </label>0552551945 9780552551946