Dixon, Franklin W. <br/><br/>
Extreme danger  
Franklin W. Dixon. 
 - 1st Aladdin Paperbacks ed. 
 - New York :  Aladdin Paperbacks,  2005. 
 - 165 p. :  ill. ;  20 cm. 
 - Hardy boys undercover brothers ;  #1 .
 - Dixon, Franklin W.  Hardy boys undercover brothers ;  #1. .
<br/><br/> Frank and Joe travel to Philadelphia where they intend to prevent an attack on an extreme sports contest called the Big Air Games. 
<br/><br/> 008-012. 
<br/><br/><label>ISBN: </label>1416900020 (pbk.)  4.99 1415603790 (BWI bdg.) 
<br/><br/><label>Standard No.: </label>9781416900023 (pbk.) 
<br/><br/><label>LCCN: </label>2004113061 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hardy Boys (Fictitious characters)--Juvenile fiction.<br/>Extreme sports--Juvenile fiction.<br/>Detective and mystery stories.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Philadelphia (Pa.)--Juvenile fiction.
<br/><br/><label>Dewey Class. No.: </label>[Fic]