The Hardy boys mystery stories 
 The secret of the old mill 

 - New York  Grosset & Dunlap  1987 
 - 180 p.  ill. 
 - The Hardy boys mystery stories .
<br/><br/> With two cases in tow, the Hardy boys look to Turner mill for clues. Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance, only to find themselves trapped. How the young detectives extricate themselves from this dangerous situation and unravel mysteries will keep readers tense with suspense! 
<br/><br/><label>ISBN: </label>9780448089034 
<br/><br/><label>Dewey Class. No.: </label>[Fic]