Ward, Michael. <br/><br/>
Planet narnia :  the seven heavens in the imagination of C.S. Lewis. 

 - New York :  Oxford University Press,  c2008. 
 - Xii, 347p. 
 - Criticism and intepretation .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780195313871 : 
<br/><br/><label>LC Class. No.: </label>PR6023  / .E92Z9