Dixon, Franklin W. <br/><br/>
The wailing siren mystery. 

 - 1st ed 
 - New York,  Grosset & Dunlap  [1951] 
 - 214 p.  front.  20 cm. 
<br/><br/> Caught in their motorboat the Sleuth by a sudden storm at sea, Frank and Joe Hardy are relieved to see the lights of a yacht. But their SOS ignored. The shrill sound of a siren fills the night air and moments later a helicopter drops an object alongside the Sleuth: a wallet containing two thousand dollars! The next day, 
<br/><br/><label>ISBN: </label>9780448089300 0448089300 
<br/><br/><label>LCCN: </label>51001496  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mysterious--Action
<br/><br/><label>LC Class. No.: </label>PZ7.D644  / Wai 
<br/><br/><label>Dewey Class. No.: </label>813.54