Learner, Tobsha <br/><br/>
The map / 
T.S. Learner 
 - London :  Sphere,  2012 
 - 598 p. ;  20 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>9780751545500 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Code and cipher stories