Korman, Gordon. <br/><br/>
The Medusa plot 
Gordon Korman 
 - 1st ed. 
 - [S.l.]  Scholastic  2011 
 - 222 p. 
 - 39 clues. Cahills vs. Vespers .
 - 39 clues. Cahills vs. Vespers .
<br/><br/><label>ISBN: </label>9780545298391 (trade)