The Hardy boys mystery stories 
 The mark on the door 

 - New York  Grosset & Dunlap  1995 
 - 180 p.  ill. 
 - The Hardy boys mystery stories .
<br/><br/> In their motorboat the Sleuth Frank and Joe Hardy search Barmet Bay for a dangerous stranger who has stolen a valuable boat. Suddenly, in the eerie fog, they spot the craft drifting aimlessly out to sea. What happens next starts the young detectives and their pal Chet Morton on an intriguing adventure that takes them to Mexico and into the comparatively unexplored desert and mountain regions of Baja California. 
<br/><br/><label>ISBN: </label>3318908440879 
<br/><br/><label>Dewey Class. No.: </label>[Fic]