Note: This is a review of the original edition, not one of the newer rewrites.
Joe accidentally knocks something out of a man's hand. A few hours later, Joe disappears. Was he kidnapped? Or is it all just some sort of prank? It is now up to Frank and his friends to find out where Joe is and why.
The bad guys do bad things. Ordinary virtues such as justice and persistence are strongly upheld by the good guys.
God has no part in this story.
Frank is hit in the back of the leg with a rock; some characters are shot at and a plane crashes, but no one is hurt. Joe is tied up and put in a cold cell, and his captors forget to feed him several times; there is a big fight between the bad guys and the good guys in which a bad guy is knocked out. There are a few scuffles throughout the book and some other minor things but nothing detailed.
Drug and Alcohol Content
Both the Hardy boys dance with their girlfriends.
Crude or Profane Language or Content
Due to the fast pace, exciting plot and great characters, this is one of my favorite books in the Hardy Boys series. I recommend this for boys and girls aged 8-13.