Carman, Patrick. <br/><br/>
The black circle /  
Patrick Carman.  
 - New York:  Scholastic,  2009.  
 - 168 p.;  20 cm.  
 - The 39 clues; 5 .
<br/><br/> Where are Amy and Dan Cahill? The two kids were last seen in Egypt, hunting for one of the 39 Clues that could make them the most powerful people on earth. But no one has seen the siblings since. Has the ruthless Irina Spasky finally tracked them down? Or worse ... the Madrigals? 
<br/><br/><label>ISBN: </label>9780545060455 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Code and cipher stories. Orphans.