The original Hardy Boys series
19. The Disappearing Floor
   
         
   

Original: 1940, 218 pages

Revised: 1964, 176 pages

Cover art

Volume 19
1940

Volume 19
1962
   
      Plot summary    
   
Coming soon
   
      Comparison of original and revised editions    
   
Coming soon
   
      Notes    
   
Coming soon
   
         
   

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