Haddix, Margaret Peterson <br/><br/>
The 39 clues (Book 10: Into the Gauntlet) 

 - New York  Scholastic  2010 
 - 327p. 
<br/><br/><label>ISBN: </label>9780545152969 
<br/><br/><label>Dewey Class. No.: </label>F  H117T