Malam, John <br/><br/>
Crack the code 
John Malam ; [illustrated by] Jon Stuart 
 - Oxford  Oxford University Press  2009 
 - 32 p. : col. ill. 
<br/><br/><label>ISBN: </label>978-0-19-847590-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General Knowledge
<br/><br/><label>Dewey Class. No.: </label>001 MAL